1224520139 has 2 divisors, whose sum is σ = 1224520140. Its totient is φ = 1224520138.

The previous prime is 1224520097. The next prime is 1224520147. The reversal of 1224520139 is 9310254221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224520139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224529139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612260069 + 612260070.

It is an arithmetic number, because the mean of its divisors is an integer number (612260070).

Almost surely, 2^1224520139 is an apocalyptic number.

1224520139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224520139 is an equidigital number, since it uses as much as digits as its factorization.

1224520139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1224520139 is about 34993.1441713945. The cubic root of 1224520139 is about 1069.8477493216.

The spelling of 1224520139 in words is "one billion, two hundred twenty-four million, five hundred twenty thousand, one hundred thirty-nine".