16991252 has 12 divisors (see below), whose sum is σ = 30367680. Its totient is φ = 8314776.

The previous prime is 16991237. The next prime is 16991281. The reversal of 16991252 is 25219961.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45002 + ... + 45377.

It is an arithmetic number, because the mean of its divisors is an integer number (2530640).

Almost surely, 2^16991252 is an apocalyptic number.

It is an amenable number.

16991252 is a deficient number, since it is larger than the sum of its proper divisors (13376428).

16991252 is a wasteful number, since it uses less digits than its factorization.

16991252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90430 (or 90428 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 16991252 is about 4122.0446382833. The cubic root of 16991252 is about 257.0840464565.

The spelling of 16991252 in words is "sixteen million, nine hundred ninety-one thousand, two hundred fifty-two".