21245466 has 16 divisors (see below), whose sum is σ = 46353888. Its totient is φ = 6438000.

The previous prime is 21245459. The next prime is 21245467. The reversal of 21245466 is 66454212.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21245467) 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, 160885 + ... + 161016.

It is an arithmetic number, because the mean of its divisors is an integer number (2897118).

Almost surely, 2^21245466 is an apocalyptic number.

21245466 is an abundant number, since it is smaller than the sum of its proper divisors (25108422).

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

21245466 is a wasteful number, since it uses less digits than its factorization.

21245466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321917.

The product of its digits is 11520, while the sum is 30.

The square root of 21245466 is about 4609.2804210636. The cubic root of 21245466 is about 276.9632119773.

Adding to 21245466 its reverse (66454212), we get a palindrome (87699678).

The spelling of 21245466 in words is "twenty-one million, two hundred forty-five thousand, four hundred sixty-six".