1224122639 has 4 divisors (see below), whose sum is σ = 1226100840. Its totient is φ = 1222144440.

The previous prime is 1224122593. The next prime is 1224122651. The reversal of 1224122639 is 9362214221.

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 1224122639 - 2¹² = 1224118543 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 (1224122239) 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, 988172 + ... + 989409.

It is an arithmetic number, because the mean of its divisors is an integer number (306525210).

Almost surely, 2^1224122639 is an apocalyptic number.

1224122639 is a deficient number, since it is larger than the sum of its proper divisors (1978201).

1224122639 is an equidigital number, since it uses as much as digits as its factorization.

1224122639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978200.

The product of its digits is 10368, while the sum is 32.

The square root of 1224122639 is about 34987.4640264195. The cubic root of 1224122639 is about 1069.7319732198.

The spelling of 1224122639 in words is "one billion, two hundred twenty-four million, one hundred twenty-two thousand, six hundred thirty-nine".