12023557 has 16 divisors (see below), whose sum is σ = 15202432. Its totient is φ = 9253440.

The previous prime is 12023513. The next prime is 12023569. The reversal of 12023557 is 75532021.

It is not a de Polignac number, because 12023557 - 2¹⁹ = 11499269 is a prime.

It is the 3468-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023507) by changing a digit.

It is a nontrivial repunit in base 3467.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (950152).

Almost surely, 2^12023557 is an apocalyptic number.

It is an amenable number.

12023557 is a deficient number, since it is larger than the sum of its proper divisors (3178875).

12023557 is a wasteful number, since it uses less digits than its factorization.

12023557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 12023557 is about 3467.5001081471. The cubic root of 12023557 is about 229.0925618835.

Adding to 12023557 its reverse (75532021), we get a palindrome (87555578).

The spelling of 12023557 in words is "twelve million, twenty-three thousand, five hundred fifty-seven".