12071557 has 2 divisors, whose sum is σ = 12071558. Its totient is φ = 12071556.

The previous prime is 12071537. The next prime is 12071567. The reversal of 12071557 is 75517021.

12071557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 23716 = 3471^2 + 154^2 .

It is an emirp because it is prime and its reverse (75517021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12071557 - 2⁷ = 12071429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12071537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6035778 + 6035779.

It is an arithmetic number, because the mean of its divisors is an integer number (6035779).

Almost surely, 2^12071557 is an apocalyptic number.

It is an amenable number.

12071557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12071557 is an equidigital number, since it uses as much as digits as its factorization.

12071557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 12071557 is about 3474.4146269552. The cubic root of 12071557 is about 229.3970153865.

Adding to 12071557 its reverse (75517021), we get a palindrome (87588578).

The spelling of 12071557 in words is "twelve million, seventy-one thousand, five hundred fifty-seven".