1242707878 has 4 divisors (see below), whose sum is σ = 1864061820. Its totient is φ = 621353938.

The previous prime is 1242707849. The next prime is 1242707887. The reversal of 1242707878 is 8787072421.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310676968 + ... + 310676971.

It is an arithmetic number, because the mean of its divisors is an integer number (466015455).

Almost surely, 2^1242707878 is an apocalyptic number.

1242707878 is a deficient number, since it is larger than the sum of its proper divisors (621353942).

1242707878 is an equidigital number, since it uses as much as digits as its factorization.

1242707878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621353941.

The product of its (nonzero) digits is 351232, while the sum is 46.

The square root of 1242707878 is about 35252.0620389787. The cubic root of 1242707878 is about 1075.1185383617.

The spelling of 1242707878 in words is "one billion, two hundred forty-two million, seven hundred seven thousand, eight hundred seventy-eight".