30640125 has 16 divisors (see below), whose sum is σ = 50985792. Its totient is φ = 16341200.

The previous prime is 30640111. The next prime is 30640151. The reversal of 30640125 is 52104603.

It is a happy number.

It is not a de Polignac number, because 30640125 - 2⁹ = 30639613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40479 + ... + 41228.

It is an arithmetic number, because the mean of its divisors is an integer number (3186612).

Almost surely, 2^30640125 is an apocalyptic number.

It is an amenable number.

30640125 is a deficient number, since it is larger than the sum of its proper divisors (20345667).

30640125 is an equidigital number, since it uses as much as digits as its factorization.

30640125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81725 (or 81715 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30640125 is about 5535.3522923117. The cubic root of 30640125 is about 312.9177346773.

Adding to 30640125 its reverse (52104603), we get a palindrome (82744728).

The spelling of 30640125 in words is "thirty million, six hundred forty thousand, one hundred twenty-five".