12157149 has 4 divisors (see below), whose sum is σ = 16209536. Its totient is φ = 8104764.

The previous prime is 12157147. The next prime is 12157151. The reversal of 12157149 is 94175121.

12157149 is digitally balanced in base 2 and base 4, because in such bases 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.

It is an interprime number because it is at equal distance from previous prime (12157147) and next prime (12157151).

It is not a de Polignac number, because 12157149 - 2¹ = 12157147 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 (12157141) 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, 2026189 + ... + 2026194.

It is an arithmetic number, because the mean of its divisors is an integer number (4052384).

Almost surely, 2^12157149 is an apocalyptic number.

It is an amenable number.

12157149 is a deficient number, since it is larger than the sum of its proper divisors (4052387).

12157149 is an equidigital number, since it uses as much as digits as its factorization.

12157149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052386.

The product of its digits is 2520, while the sum is 30.

The square root of 12157149 is about 3486.7103407080. The cubic root of 12157149 is about 229.9379101461.

The spelling of 12157149 in words is "twelve million, one hundred fifty-seven thousand, one hundred forty-nine".