12152557 has 4 divisors (see below), whose sum is σ = 12188956. Its totient is φ = 12116160.

The previous prime is 12152551. The next prime is 12152561. The reversal of 12152557 is 75525121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3218436 + 8934121 = 1794^2 + 2989^2 .

It is a cyclic number.

It is not a de Polignac number, because 12152557 - 2³ = 12152549 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 (12152551) 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, 17694 + ... + 18367.

It is an arithmetic number, because the mean of its divisors is an integer number (3047239).

Almost surely, 2^12152557 is an apocalyptic number.

It is an amenable number.

12152557 is a deficient number, since it is larger than the sum of its proper divisors (36399).

12152557 is an equidigital number, since it uses as much as digits as its factorization.

12152557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36398.

The product of its digits is 3500, while the sum is 28.

The square root of 12152557 is about 3486.0517781582. The cubic root of 12152557 is about 229.9089557738.

Adding to 12152557 its reverse (75525121), we get a palindrome (87677678).

The spelling of 12152557 in words is "twelve million, one hundred fifty-two thousand, five hundred fifty-seven".