21461125 has 16 divisors (see below), whose sum is σ = 30610944. Its totient is φ = 14715600.

The previous prime is 21461113. The next prime is 21461137. The reversal of 21461125 is 52116412.

It is an interprime number because it is at equal distance from previous prime (21461113) and next prime (21461137).

It is not a de Polignac number, because 21461125 - 2¹¹ = 21459077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21461096 and 21461105.

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, 11389 + ... + 13138.

It is an arithmetic number, because the mean of its divisors is an integer number (1913184).

Almost surely, 2^21461125 is an apocalyptic number.

21461125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21461125 is a deficient number, since it is larger than the sum of its proper divisors (9149819).

21461125 is an equidigital number, since it uses as much as digits as its factorization.

21461125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24549 (or 24539 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 21461125 is about 4632.6153520447. The cubic root of 21461125 is about 277.8971938411.

Adding to 21461125 its reverse (52116412), we get a palindrome (73577537).

The spelling of 21461125 in words is "twenty-one million, four hundred sixty-one thousand, one hundred twenty-five".