25105240 has 32 divisors (see below), whose sum is σ = 58016880. Its totient is φ = 9770112.

The previous prime is 25105219. The next prime is 25105261. The reversal of 25105240 is 4250152.

It is an interprime number because it is at equal distance from previous prime (25105219) and next prime (25105261).

It is a congruent number.

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, 7002 + ... + 9961.

Almost surely, 2^25105240 is an apocalyptic number.

25105240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25105240 is an abundant number, since it is smaller than the sum of its proper divisors (32911640).

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

25105240 is a wasteful number, since it uses less digits than its factorization.

25105240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17011 (or 17007 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25105240 is about 5010.5129477929. The cubic root of 25105240 is about 292.8114976026.

Adding to 25105240 its reverse (4250152), we get a palindrome (29355392).

It can be divided in two parts, 2510 and 5240, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 25105240 in words is "twenty-five million, one hundred five thousand, two hundred forty".