857272025 has 6 divisors (see below), whose sum is σ = 1063017342. Its totient is φ = 685817600.

The previous prime is 857271977. The next prime is 857272043. The reversal of 857272025 is 520272758.

It can be written as a sum of positive squares in 3 ways, for example, as 158357056 + 698914969 = 12584^2 + 26437^2 .

It is not a de Polignac number, because 857272025 - 2⁸ = 857271769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857272025.

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 5 ways as a sum of consecutive naturals, for example, 17145416 + ... + 17145465.

It is an arithmetic number, because the mean of its divisors is an integer number (177169557).

Almost surely, 2^857272025 is an apocalyptic number.

It is an amenable number.

857272025 is a deficient number, since it is larger than the sum of its proper divisors (205745317).

857272025 is a wasteful number, since it uses less digits than its factorization.

857272025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34290891 (or 34290886 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 857272025 is about 29279.2080664761. The cubic root of 857272025 is about 949.9619652362.

The spelling of 857272025 in words is "eight hundred fifty-seven million, two hundred seventy-two thousand, twenty-five".