25281256 has 144 divisors (see below), whose sum is σ = 66864420. Its totient is φ = 8870400.

The previous prime is 25281233. The next prime is 25281257. The reversal of 25281256 is 65218252.

It can be written as a sum of positive squares in 2 ways, for example, as 19945156 + 5336100 = 4466^2 + 2310^2 .

Its product of digits (9600) is a multiple of the sum of its prime factors (96).

It is not an unprimeable number, because it can be changed into a prime (25281257) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 616596 + ... + 616636.

Almost surely, 2^25281256 is an apocalyptic number.

25281256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25281256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33432210).

25281256 is an abundant number, since it is smaller than the sum of its proper divisors (41583164).

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

25281256 is a wasteful number, since it uses less digits than its factorization.

25281256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 74 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 25281256 is about 5028.0469369329. The cubic root of 25281256 is about 293.4942172997.

It can be divided in two parts, 25281 and 256, that multiplied together give a square (6471936 = 2544²).

The spelling of 25281256 in words is "twenty-five million, two hundred eighty-one thousand, two hundred fifty-six".