12757946 has 4 divisors (see below), whose sum is σ = 19136922. Its totient is φ = 6378972.

The previous prime is 12757909. The next prime is 12757951. The reversal of 12757946 is 64975721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11826721 + 931225 = 3439^2 + 965^2 .

It is a super-2 number, since 2×12757946² = 325530372277832, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 3189485 + ... + 3189488.

Almost surely, 2^12757946 is an apocalyptic number.

12757946 is a deficient number, since it is larger than the sum of its proper divisors (6378976).

12757946 is an equidigital number, since it uses as much as digits as its factorization.

12757946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6378975.

The product of its digits is 105840, while the sum is 41.

The square root of 12757946 is about 3571.8267035230. The cubic root of 12757946 is about 233.6649574820.

The spelling of 12757946 in words is "twelve million, seven hundred fifty-seven thousand, nine hundred forty-six".