12851557 has 4 divisors (see below), whose sum is σ = 13069440. Its totient is φ = 12633676.

The previous prime is 12851551. The next prime is 12851561. The reversal of 12851557 is 75515821.

12851557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75515821 = 1613 ⋅46817.

It is a cyclic number.

It is not a de Polignac number, because 12851557 - 2¹⁵ = 12818789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12851551) 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, 108853 + ... + 108970.

It is an arithmetic number, because the mean of its divisors is an integer number (3267360).

Almost surely, 2^12851557 is an apocalyptic number.

It is an amenable number.

12851557 is a deficient number, since it is larger than the sum of its proper divisors (217883).

12851557 is an equidigital number, since it uses as much as digits as its factorization.

12851557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217882.

The product of its digits is 14000, while the sum is 34.

The square root of 12851557 is about 3584.9068328201. The cubic root of 12851557 is about 234.2350682819.

The spelling of 12851557 in words is "twelve million, eight hundred fifty-one thousand, five hundred fifty-seven".