12601557 has 6 divisors (see below), whose sum is σ = 18202262. Its totient is φ = 8401032.

The previous prime is 12601543. The next prime is 12601559. The reversal of 12601557 is 75510621.

12601557 is a `hidden beast` number, since 1 + 2 + 601 + 5 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11029041 + 1572516 = 3321^2 + 1254^2 .

It is not a de Polignac number, because 12601557 - 2¹² = 12597461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12601557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12601559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 700078 + ... + 700095.

Almost surely, 2^12601557 is an apocalyptic number.

It is an amenable number.

12601557 is a deficient number, since it is larger than the sum of its proper divisors (5600705).

12601557 is a wasteful number, since it uses less digits than its factorization.

12601557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400179 (or 1400176 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 12601557 is about 3549.8671806139. The cubic root of 12601557 is about 232.7062616372.

The spelling of 12601557 in words is "twelve million, six hundred one thousand, five hundred fifty-seven".