12251566 has 4 divisors (see below), whose sum is σ = 18377352. Its totient is φ = 6125782.

The previous prime is 12251549. The next prime is 12251567. The reversal of 12251566 is 66515221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3062890 + ... + 3062893.

It is an arithmetic number, because the mean of its divisors is an integer number (4594338).

Almost surely, 2^12251566 is an apocalyptic number.

12251566 is a deficient number, since it is larger than the sum of its proper divisors (6125786).

12251566 is an equidigital number, since it uses as much as digits as its factorization.

12251566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125785.

The product of its digits is 3600, while the sum is 28.

The square root of 12251566 is about 3500.2237071364. The cubic root of 12251566 is about 230.5316372364.

Adding to 12251566 its reverse (66515221), we get a palindrome (78766787).

The spelling of 12251566 in words is "twelve million, two hundred fifty-one thousand, five hundred sixty-six".