25135040 has 112 divisors (see below), whose sum is σ = 70104000. Its totient is φ = 8580096.

The previous prime is 25135037. The next prime is 25135063. The reversal of 25135040 is 4053152.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109646 + ... + 109874.

Almost surely, 2^25135040 is an apocalyptic number.

25135040 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 25135040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35052000).

25135040 is an abundant number, since it is smaller than the sum of its proper divisors (44968960).

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

25135040 is an equidigital number, since it uses as much as digits as its factorization.

25135040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 25135040 is about 5013.4858132840. The cubic root of 25135040 is about 292.9273078530.

Adding to 25135040 its reverse (4053152), we get a palindrome (29188192).

The spelling of 25135040 in words is "twenty-five million, one hundred thirty-five thousand, forty".