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145121 is a prime number
BaseRepresentation
bin100011011011100001
321101001212
4203123201
514120441
63035505
71143044
oct433341
9241055
10145121
119a039
126bb95
1351092
143ac5b
152ceeb
hex236e1

145121 has 2 divisors, whose sum is σ = 145122. Its totient is φ = 145120.

The previous prime is 145109. The next prime is 145133. The reversal of 145121 is 121541.

145121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (145109) and next prime (145133).

It can be written as a sum of positive squares in only one way, i.e., 96721 + 48400 = 311^2 + 220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-145121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p13433 and since 145121 and 13433 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 145096 and 145105.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145121.

It is not a weakly prime, because it can be changed into another prime (145021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560 + 72561.

It is an arithmetic number, because the mean of its divisors is an integer number (72561).

2145121 is an apocalyptic number.

It is an amenable number.

145121 is a deficient number, since it is larger than the sum of its proper divisors (1).

145121 is an equidigital number, since it uses as much as digits as its factorization.

145121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40, while the sum is 14.

The square root of 145121 is about 380.9475029450. The cubic root of 145121 is about 52.5504880903.

Adding to 145121 its product of digits (40), we get a square (145161 = 3812).

Adding to 145121 its reverse (121541), we get a palindrome (266662).

The spelling of 145121 in words is "one hundred forty-five thousand, one hundred twenty-one".