1299943842 has 32 divisors (see below), whose sum is σ = 2656862208. Its totient is φ = 423920976.

The previous prime is 1299943837. The next prime is 1299943861. The reversal of 1299943842 is 2483499921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38623 + ... + 63965.

It is an arithmetic number, because the mean of its divisors is an integer number (83026944).

Almost surely, 2^1299943842 is an apocalyptic number.

1299943842 is an abundant number, since it is smaller than the sum of its proper divisors (1356918366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299943842 is a wasteful number, since it uses less digits than its factorization.

1299943842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25534.

The product of its digits is 1119744, while the sum is 51.

The square root of 1299943842 is about 36054.7339748888. The cubic root of 1299943842 is about 1091.3771673370.

The spelling of 1299943842 in words is "one billion, two hundred ninety-nine million, nine hundred forty-three thousand, eight hundred forty-two".