21267126 has 12 divisors (see below), whose sum is σ = 46078812. Its totient is φ = 7089036.

The previous prime is 21267107. The next prime is 21267133. The reversal of 21267126 is 62176212.

It is a self number, because there is not a number n which added to its sum of digits gives 21267126.

It is a congruent number.

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, 590736 + ... + 590771.

It is an arithmetic number, because the mean of its divisors is an integer number (3839901).

Almost surely, 2^21267126 is an apocalyptic number.

21267126 is an abundant number, since it is smaller than the sum of its proper divisors (24811686).

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

21267126 is a wasteful number, since it uses less digits than its factorization.

21267126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181515 (or 1181512 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 21267126 is about 4611.6294300388. The cubic root of 21267126 is about 277.0573024157.

The spelling of 21267126 in words is "twenty-one million, two hundred sixty-seven thousand, one hundred twenty-six".