12747657 has 8 divisors (see below), whose sum is σ = 18304384. Its totient is φ = 7844688.

The previous prime is 12747653. The next prime is 12747697. The reversal of 12747657 is 75674721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12747657 - 2² = 12747653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 326863 = 12747657 / (1 + 2 + 7 + 4 + 7 + 6 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12747653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163393 + ... + 163470.

It is an arithmetic number, because the mean of its divisors is an integer number (2288048).

Almost surely, 2^12747657 is an apocalyptic number.

It is an amenable number.

12747657 is a deficient number, since it is larger than the sum of its proper divisors (5556727).

12747657 is a wasteful number, since it uses less digits than its factorization.

12747657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326879.

The product of its digits is 82320, while the sum is 39.

The square root of 12747657 is about 3570.3861135737. The cubic root of 12747657 is about 233.6021253892.

The spelling of 12747657 in words is "twelve million, seven hundred forty-seven thousand, six hundred fifty-seven".