25125440 has 28 divisors (see below), whose sum is σ = 59830716. Its totient is φ = 10050048.

The previous prime is 25125433. The next prime is 25125461. The reversal of 25125440 is 4452152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18113536 + 7011904 = 4256^2 + 2648^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38939 + ... + 39578.

Almost surely, 2^25125440 is an apocalyptic number.

25125440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25125440 is an abundant number, since it is smaller than the sum of its proper divisors (34705276).

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

25125440 is an equidigital number, since it uses as much as digits as its factorization.

25125440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78534 (or 78524 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 25125440 is about 5012.5283041595. The cubic root of 25125440 is about 292.8900098519.

Adding to 25125440 its reverse (4452152), we get a palindrome (29577592).

The spelling of 25125440 in words is "twenty-five million, one hundred twenty-five thousand, four hundred forty".