891025725 has 48 divisors (see below), whose sum is σ = 1541419200. Its totient is φ = 453573120.

The previous prime is 891025703. The next prime is 891025739. The reversal of 891025725 is 527520198.

It is not a de Polignac number, because 891025725 - 2⁸ = 891025469 is a prime.

It is a super-2 number, since 2×891025725² = 1587853685223551250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191274 + ... + 195876.

It is an arithmetic number, because the mean of its divisors is an integer number (32112900).

Almost surely, 2^891025725 is an apocalyptic number.

It is an amenable number.

891025725 is a deficient number, since it is larger than the sum of its proper divisors (650393475).

891025725 is a wasteful number, since it uses less digits than its factorization.

891025725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4734 (or 4729 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 891025725 is about 29850.0540200516. The cubic root of 891025725 is about 962.2695597200.

The spelling of 891025725 in words is "eight hundred ninety-one million, twenty-five thousand, seven hundred twenty-five".