12157556 has 6 divisors (see below), whose sum is σ = 21275730. Its totient is φ = 6078776.

The previous prime is 12157553. The next prime is 12157559. The reversal of 12157556 is 65575121.

It is an interprime number because it is at equal distance from previous prime (12157553) and next prime (12157559).

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 144400 = 3466^2 + 380^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1519691 + ... + 1519698.

It is an arithmetic number, because the mean of its divisors is an integer number (3545955).

Almost surely, 2^12157556 is an apocalyptic number.

It is an amenable number.

12157556 is a deficient number, since it is larger than the sum of its proper divisors (9118174).

12157556 is a wasteful number, since it uses less digits than its factorization.

12157556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039393 (or 3039391 counting only the distinct ones).

The product of its digits is 10500, while the sum is 32.

The square root of 12157556 is about 3486.7687046892. The cubic root of 12157556 is about 229.9404760899.

The spelling of 12157556 in words is "twelve million, one hundred fifty-seven thousand, five hundred fifty-six".