872180725 has 24 divisors (see below), whose sum is σ = 1166218760. Its totient is φ = 643230720.

The previous prime is 872180719. The next prime is 872180783. The reversal of 872180725 is 527081278.

It can be written as a sum of positive squares in 12 ways, for example, as 638977284 + 233203441 = 25278^2 + 15271^2 .

It is not a de Polignac number, because 872180725 - 2³ = 872180717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 365737 + ... + 368113.

Almost surely, 2^872180725 is an apocalyptic number.

It is an amenable number.

872180725 is a deficient number, since it is larger than the sum of its proper divisors (294038035).

872180725 is a wasteful number, since it uses less digits than its factorization.

872180725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529 (or 3524 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 872180725 is about 29532.7060223069. The cubic root of 872180725 is about 955.4372329730.

It can be divided in two parts, 87 and 2180725, that added together give a palindrome (2180812).

The spelling of 872180725 in words is "eight hundred seventy-two million, one hundred eighty thousand, seven hundred twenty-five".