12209057 has 4 divisors (see below), whose sum is σ = 13953216. Its totient is φ = 10464900.

The previous prime is 12209023. The next prime is 12209063. The reversal of 12209057 is 75090221.

12209057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12209057 - 2¹⁰ = 12208033 is a prime.

It is a super-2 number, since 2×12209057² = 298122145658498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209357) 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, 872069 + ... + 872082.

It is an arithmetic number, because the mean of its divisors is an integer number (3488304).

Almost surely, 2^12209057 is an apocalyptic number.

It is an amenable number.

12209057 is a deficient number, since it is larger than the sum of its proper divisors (1744159).

12209057 is an equidigital number, since it uses as much as digits as its factorization.

12209057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744158.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 12209057 is about 3494.1461045583. The cubic root of 12209057 is about 230.2647046890.

Adding to 12209057 its reverse (75090221), we get a palindrome (87299278).

The spelling of 12209057 in words is "twelve million, two hundred nine thousand, fifty-seven".