25451140 has 72 divisors (see below), whose sum is σ = 63345240. Its totient is φ = 8532480.

The previous prime is 25451123. The next prime is 25451177. The reversal of 25451140 is 4115452.

It can be written as a sum of positive squares in 4 ways, for example, as 2869636 + 22581504 = 1694^2 + 4752^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31056 + ... + 31864.

It is an arithmetic number, because the mean of its divisors is an integer number (879795).

Almost surely, 2^25451140 is an apocalyptic number.

25451140 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 25451140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31672620).

25451140 is an abundant number, since it is smaller than the sum of its proper divisors (37894100).

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

25451140 is a wasteful number, since it uses less digits than its factorization.

25451140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 25451140 is about 5044.9122886330. The cubic root of 25451140 is about 294.1501539130.

Adding to 25451140 its reverse (4115452), we get a palindrome (29566592).

The spelling of 25451140 in words is "twenty-five million, four hundred fifty-one thousand, one hundred forty".