1247924079 has 6 divisors (see below), whose sum is σ = 1802557016. Its totient is φ = 831949380.

The previous prime is 1247924071. The next prime is 1247924099. The reversal of 1247924079 is 9704297421.

It is a happy number.

It is not a de Polignac number, because 1247924079 - 2³ = 1247924071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247924071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69329107 + ... + 69329124.

Almost surely, 2^1247924079 is an apocalyptic number.

1247924079 is a deficient number, since it is larger than the sum of its proper divisors (554632937).

1247924079 is a wasteful number, since it uses less digits than its factorization.

1247924079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138658237 (or 138658234 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 1247924079 is about 35325.9689039098. The cubic root of 1247924079 is about 1076.6206897693.

The spelling of 1247924079 in words is "one billion, two hundred forty-seven million, nine hundred twenty-four thousand, seventy-nine".