1242232879 has 2 divisors, whose sum is σ = 1242232880. Its totient is φ = 1242232878.

The previous prime is 1242232877. The next prime is 1242232907. The reversal of 1242232879 is 9782322421.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9782322421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242232879 - 2¹ = 1242232877 is a prime.

Together with 1242232877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242232877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621116439 + 621116440.

It is an arithmetic number, because the mean of its divisors is an integer number (621116440).

Almost surely, 2^1242232879 is an apocalyptic number.

1242232879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242232879 is an equidigital number, since it uses as much as digits as its factorization.

1242232879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 1242232879 is about 35245.3242147097. The cubic root of 1242232879 is about 1074.9815404077.

The spelling of 1242232879 in words is "one billion, two hundred forty-two million, two hundred thirty-two thousand, eight hundred seventy-nine".