1242784879 has 16 divisors (see below), whose sum is σ = 1471219200. Its totient is φ = 1027170144.

The previous prime is 1242784871. The next prime is 1242784913. The reversal of 1242784879 is 9784872421.

It is not a de Polignac number, because 1242784879 - 2³ = 1242784871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242784871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170814 + ... + 177940.

It is an arithmetic number, because the mean of its divisors is an integer number (91951200).

Almost surely, 2^1242784879 is an apocalyptic number.

1242784879 is a deficient number, since it is larger than the sum of its proper divisors (228434321).

1242784879 is an equidigital number, since it uses as much as digits as its factorization.

1242784879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8022.

The product of its digits is 1806336, while the sum is 52.

The square root of 1242784879 is about 35253.1541709391. The cubic root of 1242784879 is about 1075.1407434978.

The spelling of 1242784879 in words is "one billion, two hundred forty-two million, seven hundred eighty-four thousand, eight hundred seventy-nine".