21060525 has 48 divisors (see below), whose sum is σ = 37676160. Its totient is φ = 10348800.

The previous prime is 21060509. The next prime is 21060539. The reversal of 21060525 is 52506012.

It is not a de Polignac number, because 21060525 - 2⁴ = 21060509 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 49815 + ... + 50235.

It is an arithmetic number, because the mean of its divisors is an integer number (784920).

Almost surely, 2^21060525 is an apocalyptic number.

21060525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21060525 is a deficient number, since it is larger than the sum of its proper divisors (16615635).

21060525 is a wasteful number, since it uses less digits than its factorization.

21060525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 21060525 is about 4589.1747624164. The cubic root of 21060525 is about 276.1572171910.

Adding to 21060525 its reverse (52506012), we get a palindrome (73566537).

The spelling of 21060525 in words is "twenty-one million, sixty thousand, five hundred twenty-five".