1222851251 has 4 divisors (see below), whose sum is σ = 1239602712. Its totient is φ = 1206099792.

The previous prime is 1222851241. The next prime is 1222851257. The reversal of 1222851251 is 1521582221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1222851251 - 2²² = 1218656947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222851257) 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, 8375621 + ... + 8375766.

It is an arithmetic number, because the mean of its divisors is an integer number (309900678).

Almost surely, 2^1222851251 is an apocalyptic number.

1222851251 is a deficient number, since it is larger than the sum of its proper divisors (16751461).

1222851251 is an equidigital number, since it uses as much as digits as its factorization.

1222851251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16751460.

The product of its digits is 3200, while the sum is 29.

The square root of 1222851251 is about 34969.2901128976. The cubic root of 1222851251 is about 1069.3614995774.

The spelling of 1222851251 in words is "one billion, two hundred twenty-two million, eight hundred fifty-one thousand, two hundred fifty-one".