1299987042 has 32 divisors (see below), whose sum is σ = 2754648000. Its totient is φ = 407582208.

The previous prime is 1299987023. The next prime is 1299987151. The reversal of 1299987042 is 2407899921.

1299987042 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 219334 + ... + 225182.

It is an arithmetic number, because the mean of its divisors is an integer number (86082750).

Almost surely, 2^1299987042 is an apocalyptic number.

1299987042 is an abundant number, since it is smaller than the sum of its proper divisors (1454660958).

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

1299987042 is a wasteful number, since it uses less digits than its factorization.

1299987042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 1299987042 is about 36055.3330590635. Note that the first 3 decimals coincide. The cubic root of 1299987042 is about 1091.3892568262.

The spelling of 1299987042 in words is "one billion, two hundred ninety-nine million, nine hundred eighty-seven thousand, forty-two".