12557471 has 8 divisors (see below), whose sum is σ = 13138944. Its totient is φ = 11979000.

The previous prime is 12557453. The next prime is 12557473. The reversal of 12557471 is 17475521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12557471 is a prime.

It is a super-3 number, since 3×12557471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16346 + ... + 17096.

It is an arithmetic number, because the mean of its divisors is an integer number (1642368).

Almost surely, 2^12557471 is an apocalyptic number.

12557471 is a deficient number, since it is larger than the sum of its proper divisors (581473).

12557471 is an equidigital number, since it uses as much as digits as its factorization.

12557471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501.

The product of its digits is 9800, while the sum is 32.

The square root of 12557471 is about 3543.6522120547. The cubic root of 12557471 is about 232.4345736435.

The spelling of 12557471 in words is "twelve million, five hundred fifty-seven thousand, four hundred seventy-one".