21614025 has 24 divisors (see below), whose sum is σ = 36115744. Its totient is φ = 11404800.

The previous prime is 21614023. The next prime is 21614029. The reversal of 21614025 is 52041612.

It is not a de Polignac number, because 21614025 - 2¹ = 21614023 is a prime.

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 = 21613992 and 21614010.

It is not an unprimeable number, because it can be changed into a prime (21614023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5790 + ... + 8760.

Almost surely, 2^21614025 is an apocalyptic number.

21614025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21614025 is a deficient number, since it is larger than the sum of its proper divisors (14501719).

21614025 is a wasteful number, since it uses less digits than its factorization.

21614025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081 (or 3076 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 21614025 is about 4649.0886203642. The cubic root of 21614025 is about 278.5555931639. Note that the first 4 decimals are identical.

Adding to 21614025 its reverse (52041612), we get a palindrome (73655637).

It can be divided in two parts, 216 and 14025, that added together give a palindrome (14241).

The spelling of 21614025 in words is "twenty-one million, six hundred fourteen thousand, twenty-five".