21295746 has 24 divisors (see below), whose sum is σ = 48147840. Its totient is φ = 6789816.

The previous prime is 21295727. The next prime is 21295777. The reversal of 21295746 is 64759212.

It is a self number, because there is not a number n which added to its sum of digits gives 21295746.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25306 + ... + 26133.

It is an arithmetic number, because the mean of its divisors is an integer number (2006160).

Almost surely, 2^21295746 is an apocalyptic number.

21295746 is an abundant number, since it is smaller than the sum of its proper divisors (26852094).

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

21295746 is a wasteful number, since it uses less digits than its factorization.

21295746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51470 (or 51467 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 21295746 is about 4614.7314114691. The cubic root of 21295746 is about 277.1815289754.

It can be divided in two parts, 2129 and 5746, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 21295746 in words is "twenty-one million, two hundred ninety-five thousand, seven hundred forty-six".