145658931 has 32 divisors (see below), whose sum is σ = 226271232. Its totient is φ = 82457760.

The previous prime is 145658881. The next prime is 145658951. The reversal of 145658931 is 139856541.

It is not a de Polignac number, because 145658931 - 2⁷ = 145658803 is a prime.

It is a super-2 number, since 2×145658931² = 42433048360125522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145658951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30406 + ... + 34868.

It is an arithmetic number, because the mean of its divisors is an integer number (7070976).

Almost surely, 2^145658931 is an apocalyptic number.

145658931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145658931 is a deficient number, since it is larger than the sum of its proper divisors (80612301).

145658931 is a wasteful number, since it uses less digits than its factorization.

145658931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543.

The product of its digits is 129600, while the sum is 42.

The square root of 145658931 is about 12068.9241856928. The cubic root of 145658931 is about 526.1533898477.

The spelling of 145658931 in words is "one hundred forty-five million, six hundred fifty-eight thousand, nine hundred thirty-one".