145139975 has 12 divisors (see below), whose sum is σ = 182510640. Its totient is φ = 114475200.

The previous prime is 145139957. The next prime is 145140013. The reversal of 145139975 is 579931541.

It is not a de Polignac number, because 145139975 - 2⁸ = 145139719 is a prime.

It is a super-2 number, since 2×145139975² = 42131224686001250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39110 + ... + 42659.

It is an arithmetic number, because the mean of its divisors is an integer number (15209220).

Almost surely, 2^145139975 is an apocalyptic number.

145139975 is a deficient number, since it is larger than the sum of its proper divisors (37370665).

145139975 is an equidigital number, since it uses as much as digits as its factorization.

145139975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81850 (or 81845 counting only the distinct ones).

The product of its digits is 170100, while the sum is 44.

The square root of 145139975 is about 12047.4053223090. The cubic root of 145139975 is about 525.5277836770.

The spelling of 145139975 in words is "one hundred forty-five million, one hundred thirty-nine thousand, nine hundred seventy-five".