25259520 has 320 divisors, whose sum is σ = 98993664. Its totient is φ = 5406720.

The previous prime is 25259519. The next prime is 25259593. The reversal of 25259520 is 2595252.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1098229 + ... + 1098251.

Almost surely, 2^25259520 is an apocalyptic number.

25259520 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 25259520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49496832).

25259520 is an abundant number, since it is smaller than the sum of its proper divisors (73734144).

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

25259520 is a wasteful number, since it uses less digits than its factorization.

25259520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 25259520 is about 5025.8849966946. The cubic root of 25259520 is about 293.4100809281.

The spelling of 25259520 in words is "twenty-five million, two hundred fifty-nine thousand, five hundred twenty".