25135620 has 24 divisors (see below), whose sum is σ = 70379904. Its totient is φ = 6702816.

The previous prime is 25135609. The next prime is 25135631. The reversal of 25135620 is 2653152.

It is an interprime number because it is at equal distance from previous prime (25135609) and next prime (25135631).

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, 209404 + ... + 209523.

It is an arithmetic number, because the mean of its divisors is an integer number (2932496).

Almost surely, 2^25135620 is an apocalyptic number.

25135620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25135620 is an abundant number, since it is smaller than the sum of its proper divisors (45244284).

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

25135620 is a wasteful number, since it uses less digits than its factorization.

25135620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418939 (or 418937 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25135620 is about 5013.5436569357. The cubic root of 25135620 is about 292.9295609697.

Adding to 25135620 its reverse (2653152), we get a palindrome (27788772).

The spelling of 25135620 in words is "twenty-five million, one hundred thirty-five thousand, six hundred twenty".