21459122 has 12 divisors (see below), whose sum is σ = 32476158. Its totient is φ = 10634400.

The previous prime is 21459079. The next prime is 21459131. The reversal of 21459122 is 22195412.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 5387041 = 4009^2 + 2321^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21459091 and 21459100.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88922 + ... + 89162.

Almost surely, 2^21459122 is an apocalyptic number.

21459122 is a deficient number, since it is larger than the sum of its proper divisors (11017036).

21459122 is an equidigital number, since it uses as much as digits as its factorization.

21459122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 454 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 21459122 is about 4632.3991624211. The cubic root of 21459122 is about 277.8885480471. Note that the first 3 decimals are identical.

The spelling of 21459122 in words is "twenty-one million, four hundred fifty-nine thousand, one hundred twenty-two".