9139925 has 24 divisors (see below), whose sum is σ = 11973192. Its totient is φ = 6912000.

The previous prime is 9139883. The next prime is 9139927. The reversal of 9139925 is 5299319.

It can be written as a sum of positive squares in 12 ways, for example, as 1779556 + 7360369 = 1334^2 + 2713^2 .

It is not a de Polignac number, because 9139925 - 2⁶ = 9139861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9139927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37805 + ... + 38045.

It is an arithmetic number, because the mean of its divisors is an integer number (498883).

Almost surely, 2^9139925 is an apocalyptic number.

It is an amenable number.

9139925 is a deficient number, since it is larger than the sum of its proper divisors (2833267).

9139925 is a wasteful number, since it uses less digits than its factorization.

9139925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 324 counting only the distinct ones).

The product of its digits is 21870, while the sum is 38.

The square root of 9139925 is about 3023.2308876432. The cubic root of 9139925 is about 209.0808276917.

Subtracting from 9139925 its reverse (5299319), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 9139925 in words is "nine million, one hundred thirty-nine thousand, nine hundred twenty-five".