1242447699 has 8 divisors (see below), whose sum is σ = 1656770512. Its totient is φ = 828211680.

The previous prime is 1242447671. The next prime is 1242447709. The reversal of 1242447699 is 9967442421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242447699 - 2²⁸ = 974012243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242447659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27909 + ... + 57129.

It is an arithmetic number, because the mean of its divisors is an integer number (207096314).

Almost surely, 2^1242447699 is an apocalyptic number.

1242447699 is a deficient number, since it is larger than the sum of its proper divisors (414322813).

1242447699 is a wasteful number, since it uses less digits than its factorization.

1242447699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43397.

The product of its digits is 870912, while the sum is 48.

The square root of 1242447699 is about 35248.3715794077. The cubic root of 1242447699 is about 1075.0435025482.

The spelling of 1242447699 in words is "one billion, two hundred forty-two million, four hundred forty-seven thousand, six hundred ninety-nine".