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153421 is a prime number
BaseRepresentation
bin100101011101001101
321210110021
4211131031
514402141
63142141
71206202
oct453515
9253407
10153421
11a52a4
1274951
1354aa8
143dca9
15306d1
hex2574d

153421 has 2 divisors, whose sum is σ = 153422. Its totient is φ = 153420.

The previous prime is 153409. The next prime is 153427. The reversal of 153421 is 124351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108900 + 44521 = 330^2 + 211^2 .

It is an emirp because it is prime and its reverse (124351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 153421 - 29 = 152909 is a prime.

153421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 153395 and 153404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76710 + 76711.

It is an arithmetic number, because the mean of its divisors is an integer number (76711).

2153421 is an apocalyptic number.

It is an amenable number.

153421 is a deficient number, since it is larger than the sum of its proper divisors (1).

153421 is an equidigital number, since it uses as much as digits as its factorization.

153421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 16.

The square root of 153421 is about 391.6899283872. The cubic root of 153421 is about 53.5338243614.

Adding to 153421 its reverse (124351), we get a palindrome (277772).

It can be divided in two parts, 15 and 3421, that multiplied together give a palindrome (51315).

The spelling of 153421 in words is "one hundred fifty-three thousand, four hundred twenty-one".