72102025 has 6 divisors (see below), whose sum is σ = 89406542. Its totient is φ = 57681600.

The previous prime is 72101993. The next prime is 72102031. The reversal of 72102025 is 52020127.

It can be written as a sum of positive squares in 3 ways, for example, as 9960336 + 62141689 = 3156^2 + 7883^2 .

It is not a de Polignac number, because 72102025 - 2⁵ = 72101993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72101993 and 72102011.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1442016 + ... + 1442065.

Almost surely, 2^72102025 is an apocalyptic number.

It is an amenable number.

72102025 is a deficient number, since it is larger than the sum of its proper divisors (17304517).

72102025 is a wasteful number, since it uses less digits than its factorization.

72102025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884091 (or 2884086 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 72102025 is about 8491.2911267957. The cubic root of 72102025 is about 416.2131723799.

The spelling of 72102025 in words is "seventy-two million, one hundred two thousand, twenty-five".