25961490 has 24 divisors (see below), whose sum is σ = 67500108. Its totient is φ = 6923040.

The previous prime is 25961489. The next prime is 25961491. The reversal of 25961490 is 9416952.

It is an interprime number because it is at equal distance from previous prime (25961489) and next prime (25961491).

It can be written as a sum of positive squares in 2 ways, for example, as 21538881 + 4422609 = 4641^2 + 2103^2 .

It is not an unprimeable number, because it can be changed into a prime (25961491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144141 + ... + 144320.

Almost surely, 2^25961490 is an apocalyptic number.

25961490 is an abundant number, since it is smaller than the sum of its proper divisors (41538618).

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

25961490 is a wasteful number, since it uses less digits than its factorization.

25961490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288474 (or 288471 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 25961490 is about 5095.2418980849. The cubic root of 25961490 is about 296.1032708200.

The spelling of 25961490 in words is "twenty-five million, nine hundred sixty-one thousand, four hundred ninety".