21265046 has 16 divisors (see below), whose sum is σ = 35276688. Its totient is φ = 9532800.

The previous prime is 21265043. The next prime is 21265051. The reversal of 21265046 is 64056212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21265043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5015 + ... + 8226.

It is an arithmetic number, because the mean of its divisors is an integer number (2204793).

Almost surely, 2^21265046 is an apocalyptic number.

21265046 is a deficient number, since it is larger than the sum of its proper divisors (14011642).

21265046 is a wasteful number, since it uses less digits than its factorization.

21265046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13327.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 21265046 is about 4611.4039077053. The cubic root of 21265046 is about 277.0482697272.

The spelling of 21265046 in words is "twenty-one million, two hundred sixty-five thousand, forty-six".