872290621225 has 9 divisors (see below), whose sum is σ = 1081646160933. Its totient is φ = 697828761120.

The previous prime is 872290621219. The next prime is 872290621229. The reversal of 872290621225 is 522126092278.

The square root of 872290621225 is 933965.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 264645426969 + 607645194256 = 514437^2 + 779516^2 .

It is not a de Polignac number, because 872290621225 - 2²³ = 872282232617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872290621229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4576429 + ... + 4763221.

Almost surely, 2^872290621225 is an apocalyptic number.

872290621225 is the 933965-th square number.

872290621225 is the 466983-rd centered octagonal number.

It is an amenable number.

872290621225 is a deficient number, since it is larger than the sum of its proper divisors (209355539708).

872290621225 is an frugal number, since it uses more digits than its factorization.

872290621225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373596 (or 186798 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 872290621225 in words is "eight hundred seventy-two billion, two hundred ninety million, six hundred twenty-one thousand, two hundred twenty-five".