21264514 has 4 divisors (see below), whose sum is σ = 31896774. Its totient is φ = 10632256.

The previous prime is 21264497. The next prime is 21264521. The reversal of 21264514 is 41546212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17363889 + 3900625 = 4167^2 + 1975^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5316127 + ... + 5316130.

Almost surely, 2^21264514 is an apocalyptic number.

21264514 is a deficient number, since it is larger than the sum of its proper divisors (10632260).

21264514 is a wasteful number, since it uses less digits than its factorization.

21264514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632259.

The product of its digits is 1920, while the sum is 25.

The square root of 21264514 is about 4611.3462242603. The cubic root of 21264514 is about 277.0459593488.

The spelling of 21264514 in words is "twenty-one million, two hundred sixty-four thousand, five hundred fourteen".