1242022139 has 2 divisors, whose sum is σ = 1242022140. Its totient is φ = 1242022138.

The previous prime is 1242022127. The next prime is 1242022163. The reversal of 1242022139 is 9312202421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242022139 - 2⁴ = 1242022123 is a prime.

It is a super-2 number, since 2×1242022139² = 3085237987532270642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1242022189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621011069 + 621011070.

It is an arithmetic number, because the mean of its divisors is an integer number (621011070).

Almost surely, 2^1242022139 is an apocalyptic number.

1242022139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242022139 is an equidigital number, since it uses as much as digits as its factorization.

1242022139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1242022139 is about 35242.3344714847. The cubic root of 1242022139 is about 1074.9207481506.

The spelling of 1242022139 in words is "one billion, two hundred forty-two million, twenty-two thousand, one hundred thirty-nine".