12022557 has 4 divisors (see below), whose sum is σ = 16030080. Its totient is φ = 8015036.

The previous prime is 12022531. The next prime is 12022561. The reversal of 12022557 is 75522021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75522021 = 3 ⋅25174007.

It is a cyclic number.

It is not a de Polignac number, because 12022557 - 2¹¹ = 12020509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003757 + ... + 2003762.

It is an arithmetic number, because the mean of its divisors is an integer number (4007520).

Almost surely, 2^12022557 is an apocalyptic number.

It is an amenable number.

12022557 is a deficient number, since it is larger than the sum of its proper divisors (4007523).

12022557 is an equidigital number, since it uses as much as digits as its factorization.

12022557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007522.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 12022557 is about 3467.3559090465. The cubic root of 12022557 is about 229.0862104931.

Adding to 12022557 its reverse (75522021), we get a palindrome (87544578).

The spelling of 12022557 in words is "twelve million, twenty-two thousand, five hundred fifty-seven".