16621252 has 12 divisors (see below), whose sum is σ = 29317120. Its totient is φ = 8244936.

The previous prime is 16621229. The next prime is 16621259. The reversal of 16621252 is 25212661.

It is not an unprimeable number, because it can be changed into a prime (16621259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15852 + ... + 16867.

Almost surely, 2^16621252 is an apocalyptic number.

It is an amenable number.

16621252 is a deficient number, since it is larger than the sum of its proper divisors (12695868).

16621252 is a wasteful number, since it uses less digits than its factorization.

16621252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32850 (or 32848 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 16621252 is about 4076.9169724192. The cubic root of 16621252 is about 255.2042551611.

The spelling of 16621252 in words is "sixteen million, six hundred twenty-one thousand, two hundred fifty-two".