12247257 has 12 divisors (see below), whose sum is σ = 17949680. Its totient is φ = 7422360.

The previous prime is 12247253. The next prime is 12247271. The reversal of 12247257 is 75274221.

It is not a de Polignac number, because 12247257 - 2² = 12247253 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12247253) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 16507 + ... + 17232.

Almost surely, 2^12247257 is an apocalyptic number.

It is an amenable number.

12247257 is a deficient number, since it is larger than the sum of its proper divisors (5702423).

12247257 is a wasteful number, since it uses less digits than its factorization.

12247257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33764 (or 33753 counting only the distinct ones).

The product of its digits is 7840, while the sum is 30.

The square root of 12247257 is about 3499.6081209187. The cubic root of 12247257 is about 230.5046072957.

The spelling of 12247257 in words is "twelve million, two hundred forty-seven thousand, two hundred fifty-seven".