12557001 has 8 divisors (see below), whose sum is σ = 16767520. Its totient is φ = 8358912.

The previous prime is 12556997. The next prime is 12557021. The reversal of 12557001 is 10075521.

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

It is not a de Polignac number, because 12557001 - 2² = 12556997 is a prime.

It is a super-2 number, since 2×12557001² = 315356548228002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12557021) 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, 415 + ... + 5028.

It is an arithmetic number, because the mean of its divisors is an integer number (2095940).

Almost surely, 2^12557001 is an apocalyptic number.

It is an amenable number.

12557001 is a deficient number, since it is larger than the sum of its proper divisors (4210519).

12557001 is an equidigital number, since it uses as much as digits as its factorization.

12557001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6215.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 12557001 is about 3543.5858956712. The cubic root of 12557001 is about 232.4316737599.

It can be divided in two parts, 1255 and 7001, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 12557001 in words is "twelve million, five hundred fifty-seven thousand, one".