30137925 has 12 divisors (see below), whose sum is σ = 49828160. Its totient is φ = 16073520.

The previous prime is 30137893. The next prime is 30137927. The reversal of 30137925 is 52973103.

It is not a de Polignac number, because 30137925 - 2⁵ = 30137893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30137892 and 30137901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30137927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200845 + ... + 200994.

Almost surely, 2^30137925 is an apocalyptic number.

It is an amenable number.

30137925 is a deficient number, since it is larger than the sum of its proper divisors (19690235).

30137925 is a wasteful number, since it uses less digits than its factorization.

30137925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401852 (or 401847 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 30137925 is about 5489.8019089945. The cubic root of 30137925 is about 311.1987060841.

It can be divided in two parts, 301 and 37925, that added together give a triangular number (38226 = T₂₇₆).

The spelling of 30137925 in words is "thirty million, one hundred thirty-seven thousand, nine hundred twenty-five".