21462525 has 36 divisors (see below), whose sum is σ = 43936672. Its totient is φ = 9810720.

The previous prime is 21462521. The next prime is 21462541. The reversal of 21462525 is 52526412.

21462525 is a `hidden beast` number, since 2 + 14 + 625 + 25 = 666.

It is not a de Polignac number, because 21462525 - 2² = 21462521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21462521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5239 + ... + 8388.

Almost surely, 2^21462525 is an apocalyptic number.

21462525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21462525 is an abundant number, since it is smaller than the sum of its proper divisors (22474147).

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

21462525 is a wasteful number, since it uses less digits than its factorization.

21462525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13650 (or 13642 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 21462525 is about 4632.7664521320. The cubic root of 21462525 is about 277.9032365130.

Adding to 21462525 its reverse (52526412), we get a palindrome (73988937).

The spelling of 21462525 in words is "twenty-one million, four hundred sixty-two thousand, five hundred twenty-five".