1242023239 has 2 divisors, whose sum is σ = 1242023240. Its totient is φ = 1242023238.

The previous prime is 1242023203. The next prime is 1242023249. The reversal of 1242023239 is 9323202421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242023239 - 2¹⁷ = 1241892167 is a prime.

It is a super-2 number, since 2×1242023239² = 3085243452432102242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242023249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621011619 + 621011620.

It is an arithmetic number, because the mean of its divisors is an integer number (621011620).

Almost surely, 2^1242023239 is an apocalyptic number.

1242023239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242023239 is an equidigital number, since it uses as much as digits as its factorization.

1242023239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1242023239 is about 35242.3500777119. The cubic root of 1242023239 is about 1074.9210654860.

The spelling of 1242023239 in words is "one billion, two hundred forty-two million, twenty-three thousand, two hundred thirty-nine".