145231924 has 12 divisors (see below), whose sum is σ = 254245348. Its totient is φ = 72590400.

The previous prime is 145231907. The next prime is 145231937. The reversal of 145231924 is 429132541.

It can be written as a sum of positive squares in 2 ways, for example, as 112741924 + 32490000 = 10618^2 + 5700^2 .

It is a hoax number, since the sum of its digits (31) 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 3 ways as a sum of consecutive naturals, for example, 12784 + ... + 21304.

Almost surely, 2^145231924 is an apocalyptic number.

It is an amenable number.

145231924 is a deficient number, since it is larger than the sum of its proper divisors (109013424).

145231924 is a wasteful number, since it uses less digits than its factorization.

145231924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12786 (or 12784 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 145231924 is about 12051.2208510175. The cubic root of 145231924 is about 525.6387376107.

The spelling of 145231924 in words is "one hundred forty-five million, two hundred thirty-one thousand, nine hundred twenty-four".