1247042699 has 16 divisors (see below), whose sum is σ = 1488115200. Its totient is φ = 1044023400.

The previous prime is 1247042689. The next prime is 1247042707. The reversal of 1247042699 is 9962407421.

It is not a de Polignac number, because 1247042699 - 2⁴ = 1247042683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247042609) 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, 27527 + ... + 57024.

It is an arithmetic number, because the mean of its divisors is an integer number (93007200).

Almost surely, 2^1247042699 is an apocalyptic number.

1247042699 is a deficient number, since it is larger than the sum of its proper divisors (241072501).

1247042699 is an frugal number, since it uses more digits than its factorization.

1247042699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84615 (or 84601 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1247042699 is about 35313.4917418258. The cubic root of 1247042699 is about 1076.3671659518.

The spelling of 1247042699 in words is "one billion, two hundred forty-seven million, forty-two thousand, six hundred ninety-nine".