21414025 has 12 divisors (see below), whose sum is σ = 27410944. Its totient is φ = 16578000.

The previous prime is 21413993. The next prime is 21414037. The reversal of 21414025 is 52041412.

It is not a de Polignac number, because 21414025 - 2⁵ = 21413993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21413993 and 21414011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13041 + ... + 14590.

Almost surely, 2^21414025 is an apocalyptic number.

21414025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21414025 is a deficient number, since it is larger than the sum of its proper divisors (5996919).

21414025 is a wasteful number, since it uses less digits than its factorization.

21414025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27672 (or 27667 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21414025 is about 4627.5290382665. The cubic root of 21414025 is about 277.6937477680.

Adding to 21414025 its reverse (52041412), we get a palindrome (73455437).

The spelling of 21414025 in words is "twenty-one million, four hundred fourteen thousand, twenty-five".