82621025 has 24 divisors (see below), whose sum is σ = 108400800. Its totient is φ = 62294400.

The previous prime is 82620997. The next prime is 82621039. The reversal of 82621025 is 52012628.

It is a de Polignac number, because none of the positive numbers 2^k-82621025 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82620985 and 82621003.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 133166 + ... + 133784.

It is an arithmetic number, because the mean of its divisors is an integer number (4516700).

Almost surely, 2^82621025 is an apocalyptic number.

It is an amenable number.

82621025 is a deficient number, since it is larger than the sum of its proper divisors (25779775).

82621025 is a wasteful number, since it uses less digits than its factorization.

82621025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 82621025 is about 9089.6108277527. The cubic root of 82621025 is about 435.5421522231.

The spelling of 82621025 in words is "eighty-two million, six hundred twenty-one thousand, twenty-five".