21414125 has 16 divisors (see below), whose sum is σ = 26914368. Its totient is φ = 17010000.

The previous prime is 21414119. The next prime is 21414193. The reversal of 21414125 is 52141412.

It is a happy number.

It is not a de Polignac number, because 21414125 - 2⁸ = 21413869 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21414097 and 21414106.

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, 19850 + ... + 20900.

It is an arithmetic number, because the mean of its divisors is an integer number (1682148).

Almost surely, 2^21414125 is an apocalyptic number.

21414125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21414125 is a deficient number, since it is larger than the sum of its proper divisors (5500243).

21414125 is a wasteful number, since it uses less digits than its factorization.

21414125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1219 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 21414125 is about 4627.5398431564. The cubic root of 21414125 is about 277.6941800288.

Adding to 21414125 its reverse (52141412), we get a palindrome (73555537).

The spelling of 21414125 in words is "twenty-one million, four hundred fourteen thousand, one hundred twenty-five".