25540272 has 60 divisors (see below), whose sum is σ = 74135880. Its totient is φ = 8512128.

The previous prime is 25540261. The next prime is 25540283. The reversal of 25540272 is 27204552.

25540272 is a `hidden beast` number, since 255 + 402 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (25540261) and next prime (25540283).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 604 + ... + 7172.

It is an arithmetic number, because the mean of its divisors is an integer number (1235598).

Almost surely, 2^25540272 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 25540272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37067940).

25540272 is an abundant number, since it is smaller than the sum of its proper divisors (48595608).

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

25540272 is an equidigital number, since it uses as much as digits as its factorization.

25540272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592 (or 6574 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 25540272 is about 5053.7384182405. The cubic root of 25540272 is about 294.4931332430.

The spelling of 25540272 in words is "twenty-five million, five hundred forty thousand, two hundred seventy-two".