25271040 has 72 divisors (see below), whose sum is σ = 80721648. Its totient is φ = 6737920.

The previous prime is 25271033. The next prime is 25271069. The reversal of 25271040 is 4017252.

It is a junction number, because it is equal to n+sod(n) for n = 25270998 and 25271016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550 + ... + 7130.

It is an arithmetic number, because the mean of its divisors is an integer number (1121134).

Almost surely, 2^25271040 is an apocalyptic number.

25271040 is a gapful number since it is divisible by the number (20) 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 25271040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40360824).

25271040 is an abundant number, since it is smaller than the sum of its proper divisors (55450608).

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

25271040 is an equidigital number, since it uses as much as digits as its factorization.

25271040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605 (or 6591 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 25271040 is about 5027.0309328668. The cubic root of 25271040 is about 293.4546789043.

Adding to 25271040 its reverse (4017252), we get a palindrome (29288292).

The spelling of 25271040 in words is "twenty-five million, two hundred seventy-one thousand, forty".