12153947 has 4 divisors (see below), whose sum is σ = 13088880. Its totient is φ = 11219016.

The previous prime is 12153943. The next prime is 12153971. The reversal of 12153947 is 74935121.

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 12153947 - 2² = 12153943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12153943) 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, 467447 + ... + 467472.

It is an arithmetic number, because the mean of its divisors is an integer number (3272220).

Almost surely, 2^12153947 is an apocalyptic number.

12153947 is a deficient number, since it is larger than the sum of its proper divisors (934933).

12153947 is an equidigital number, since it uses as much as digits as its factorization.

12153947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934932.

The product of its digits is 7560, while the sum is 32.

The square root of 12153947 is about 3486.2511384007. The cubic root of 12153947 is about 229.9177210421.

The spelling of 12153947 in words is "twelve million, one hundred fifty-three thousand, nine hundred forty-seven".