1242515863 has 2 divisors, whose sum is σ = 1242515864. Its totient is φ = 1242515862.

The previous prime is 1242515851. The next prime is 1242515891. The reversal of 1242515863 is 3685152421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242515863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242515843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621257931 + 621257932.

It is an arithmetic number, because the mean of its divisors is an integer number (621257932).

Almost surely, 2^1242515863 is an apocalyptic number.

1242515863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242515863 is an equidigital number, since it uses as much as digits as its factorization.

1242515863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

The square root of 1242515863 is about 35249.3384760622. The cubic root of 1242515863 is about 1075.0631621082.

The spelling of 1242515863 in words is "one billion, two hundred forty-two million, five hundred fifteen thousand, eight hundred sixty-three".