21114125 has 8 divisors (see below), whose sum is σ = 26350584. Its totient is φ = 16891200.

The previous prime is 21114103. The next prime is 21114127. The reversal of 21114125 is 52141112.

It can be written as a sum of positive squares in 4 ways, for example, as 1630729 + 19483396 = 1277^2 + 4414^2 .

It is not a de Polignac number, because 21114125 - 2¹⁰ = 21113101 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 (21114127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84332 + ... + 84581.

It is an arithmetic number, because the mean of its divisors is an integer number (3293823).

Almost surely, 2^21114125 is an apocalyptic number.

21114125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21114125 is a deficient number, since it is larger than the sum of its proper divisors (5236459).

21114125 is an equidigital number, since it uses as much as digits as its factorization.

21114125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168928 (or 168918 counting only the distinct ones).

The product of its digits is 80, while the sum is 17.

The square root of 21114125 is about 4595.0108813799. The cubic root of 21114125 is about 276.3912963081.

Adding to 21114125 its reverse (52141112), we get a palindrome (73255237).

The spelling of 21114125 in words is "twenty-one million, one hundred fourteen thousand, one hundred twenty-five".