12157699 has 4 divisors (see below), whose sum is σ = 12576960. Its totient is φ = 11738440.

The previous prime is 12157697. The next prime is 12157711. The reversal of 12157699 is 99675121.

12157699 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.

It is a cyclic number.

It is not a de Polignac number, because 12157699 - 2¹ = 12157697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12157693) 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, 209587 + ... + 209644.

It is an arithmetic number, because the mean of its divisors is an integer number (3144240).

Almost surely, 2^12157699 is an apocalyptic number.

12157699 is a deficient number, since it is larger than the sum of its proper divisors (419261).

12157699 is an equidigital number, since it uses as much as digits as its factorization.

12157699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419260.

The product of its digits is 34020, while the sum is 40.

The square root of 12157699 is about 3486.7892107209. The cubic root of 12157699 is about 229.9413776242.

The spelling of 12157699 in words is "twelve million, one hundred fifty-seven thousand, six hundred ninety-nine".