1222511239 has 4 divisors (see below), whose sum is σ = 1222910856. Its totient is φ = 1222111624.

The previous prime is 1222511237. The next prime is 1222511261. The reversal of 1222511239 is 9321152221.

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 1222511239 - 2¹ = 1222511237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222511237) 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, 195184 + ... + 201349.

It is an arithmetic number, because the mean of its divisors is an integer number (305727714).

Almost surely, 2^1222511239 is an apocalyptic number.

1222511239 is a deficient number, since it is larger than the sum of its proper divisors (399617).

1222511239 is an equidigital number, since it uses as much as digits as its factorization.

1222511239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399616.

The product of its digits is 2160, while the sum is 28.

The square root of 1222511239 is about 34964.4281949527. The cubic root of 1222511239 is about 1069.2623789236.

The spelling of 1222511239 in words is "one billion, two hundred twenty-two million, five hundred eleven thousand, two hundred thirty-nine".