12699557 has 8 divisors (see below), whose sum is σ = 13870080. Its totient is φ = 11556720.

The previous prime is 12699551. The next prime is 12699559. The reversal of 12699557 is 75599621.

It is a happy number.

12699557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12699557 - 2¹⁰ = 12698533 is a prime.

It is a super-2 number, since 2×12699557² = 322557495992498, which contains 22 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 (12699551) 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, 5957 + ... + 7802.

It is an arithmetic number, because the mean of its divisors is an integer number (1733760).

Almost surely, 2^12699557 is an apocalyptic number.

It is an amenable number.

12699557 is a deficient number, since it is larger than the sum of its proper divisors (1170523).

12699557 is a wasteful number, since it uses less digits than its factorization.

12699557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13843.

The product of its digits is 170100, while the sum is 44.

The square root of 12699557 is about 3563.6437813003. The cubic root of 12699557 is about 233.3079425886.

The spelling of 12699557 in words is "twelve million, six hundred ninety-nine thousand, five hundred fifty-seven".