25128532 has 48 divisors (see below), whose sum is σ = 52157952. Its totient is φ = 10442880.

The previous prime is 25128517. The next prime is 25128541. The reversal of 25128532 is 23582152.

It is a self number, because there is not a number n which added to its sum of digits gives 25128532.

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, 112573 + ... + 112795.

It is an arithmetic number, because the mean of its divisors is an integer number (1086624).

Almost surely, 2^25128532 is an apocalyptic number.

25128532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25128532 is an abundant number, since it is smaller than the sum of its proper divisors (27029420).

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

25128532 is a wasteful number, since it uses less digits than its factorization.

25128532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 25128532 is about 5012.8367218572. The cubic root of 25128532 is about 292.9020239535.

The spelling of 25128532 in words is "twenty-five million, one hundred twenty-eight thousand, five hundred thirty-two".