12551657 has 4 divisors (see below), whose sum is σ = 12843600. Its totient is φ = 12259716.

The previous prime is 12551653. The next prime is 12551663. The reversal of 12551657 is 75615521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12551657 - 2² = 12551653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12551653) 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, 145907 + ... + 145992.

It is an arithmetic number, because the mean of its divisors is an integer number (3210900).

Almost surely, 2^12551657 is an apocalyptic number.

It is an amenable number.

12551657 is a deficient number, since it is larger than the sum of its proper divisors (291943).

12551657 is an equidigital number, since it uses as much as digits as its factorization.

12551657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291942.

The product of its digits is 10500, while the sum is 32.

The square root of 12551657 is about 3542.8317769829. The cubic root of 12551657 is about 232.3986963765.

The spelling of 12551657 in words is "twelve million, five hundred fifty-one thousand, six hundred fifty-seven".