21226134 has 32 divisors (see below), whose sum is σ = 44190720. Its totient is φ = 6789600.

The previous prime is 21226111. The next prime is 21226141. The reversal of 21226134 is 43162212.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21226134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25444 + ... + 26264.

It is an arithmetic number, because the mean of its divisors is an integer number (1380960).

Almost surely, 2^21226134 is an apocalyptic number.

21226134 is the 2463-rd nonagonal number.

21226134 is an abundant number, since it is smaller than the sum of its proper divisors (22964586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21226134 is a wasteful number, since it uses less digits than its factorization.

21226134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its digits is 576, while the sum is 21.

The square root of 21226134 is about 4607.1828702581. The cubic root of 21226134 is about 276.8791802809.

Adding to 21226134 its reverse (43162212), we get a palindrome (64388346).

It can be divided in two parts, 2122 and 6134, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 21226134 in words is "twenty-one million, two hundred twenty-six thousand, one hundred thirty-four".