25520502 has 64 divisors (see below), whose sum is σ = 63811584. Its totient is φ = 6635520.

The previous prime is 25520489. The next prime is 25520527. The reversal of 25520502 is 20502552.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21558 + ... + 22710.

It is an arithmetic number, because the mean of its divisors is an integer number (997056).

Almost surely, 2^25520502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25520502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31905792).

25520502 is an abundant number, since it is smaller than the sum of its proper divisors (38291082).

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

25520502 is a wasteful number, since it uses less digits than its factorization.

25520502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 25520502 is about 5051.7820618075. The cubic root of 25520502 is about 294.4171273683.

The spelling of 25520502 in words is "twenty-five million, five hundred twenty thousand, five hundred two".