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145139 is a prime number
BaseRepresentation
bin100011011011110011
321101002112
4203123303
514121024
63035535
71143101
oct433363
9241075
10145139
119a055
126bbab
13510a7
143ac71
152d00e
hex236f3

145139 has 2 divisors, whose sum is σ = 145140. Its totient is φ = 145138.

The previous prime is 145133. The next prime is 145177. The reversal of 145139 is 931541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145139 - 28 = 144883 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (145133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72569 + 72570.

It is an arithmetic number, because the mean of its divisors is an integer number (72570).

2145139 is an apocalyptic number.

145139 is a deficient number, since it is larger than the sum of its proper divisors (1).

145139 is an equidigital number, since it uses as much as digits as its factorization.

145139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 145139 is about 380.9711275149. The cubic root of 145139 is about 52.5526606903.

The spelling of 145139 in words is "one hundred forty-five thousand, one hundred thirty-nine".