12065557 has 4 divisors (see below), whose sum is σ = 13789216. Its totient is φ = 10341900.

The previous prime is 12065549. The next prime is 12065567. The reversal of 12065557 is 75556021.

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 a cyclic number.

It is not a de Polignac number, because 12065557 - 2³ = 12065549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12065507) 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 in 3 ways as a sum of consecutive naturals, for example, 861819 + ... + 861832.

It is an arithmetic number, because the mean of its divisors is an integer number (3447304).

Almost surely, 2^12065557 is an apocalyptic number.

It is an amenable number.

12065557 is a deficient number, since it is larger than the sum of its proper divisors (1723659).

12065557 is an equidigital number, since it uses as much as digits as its factorization.

12065557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723658.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 12065557 is about 3473.5510648326. The cubic root of 12065557 is about 229.3590028862.

The spelling of 12065557 in words is "twelve million, sixty-five thousand, five hundred fifty-seven".