25851456 has 84 divisors (see below), whose sum is σ = 76163932. Its totient is φ = 8377344.

The previous prime is 25851451. The next prime is 25851461. The reversal of 25851456 is 65415852.

It is an interprime number because it is at equal distance from previous prime (25851451) and next prime (25851461).

It can be written as a sum of positive squares in 2 ways, for example, as 11289600 + 14561856 = 3360^2 + 3816^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 25851456.

It is not an unprimeable number, because it can be changed into a prime (25851451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20706 + ... + 21918.

Almost surely, 2^25851456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25851456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38081966).

25851456 is an abundant number, since it is smaller than the sum of its proper divisors (50312476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25851456 is a wasteful number, since it uses less digits than its factorization.

25851456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268 (or 1255 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 25851456 is about 5084.4327117192. The cubic root of 25851456 is about 295.6843481960.

The spelling of 25851456 in words is "twenty-five million, eight hundred fifty-one thousand, four hundred fifty-six".