21412250 has 32 divisors (see below), whose sum is σ = 41081040. Its totient is φ = 8352000.

The previous prime is 21412219. The next prime is 21412267. The reversal of 21412250 is 5221412.

It can be written as a sum of positive squares in 8 ways, for example, as 279841 + 21132409 = 529^2 + 4597^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9206 + ... + 11294.

Almost surely, 2^21412250 is an apocalyptic number.

21412250 is a deficient number, since it is larger than the sum of its proper divisors (19668790).

21412250 is a wasteful number, since it uses less digits than its factorization.

21412250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21412250 is about 4627.3372472730. The cubic root of 21412250 is about 277.6860749146.

Adding to 21412250 its reverse (5221412), we get a palindrome (26633662).

The spelling of 21412250 in words is "twenty-one million, four hundred twelve thousand, two hundred fifty".