1247942073 has 32 divisors (see below), whose sum is σ = 2026561536. Its totient is φ = 667579968.

The previous prime is 1247942063. The next prime is 1247942077. The reversal of 1247942073 is 3702497421.

It is not a de Polignac number, because 1247942073 - 2⁵ = 1247942041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1247942077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4786 + ... + 50187.

It is an arithmetic number, because the mean of its divisors is an integer number (63330048).

Almost surely, 2^1247942073 is an apocalyptic number.

It is an amenable number.

1247942073 is a deficient number, since it is larger than the sum of its proper divisors (778619463).

1247942073 is a wasteful number, since it uses less digits than its factorization.

1247942073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55053.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 1247942073 is about 35326.2235881505. The cubic root of 1247942073 is about 1076.6258643949.

The spelling of 1247942073 in words is "one billion, two hundred forty-seven million, nine hundred forty-two thousand, seventy-three".