1247879476 has 6 divisors (see below), whose sum is σ = 2183789090. Its totient is φ = 623939736.

The previous prime is 1247879471. The next prime is 1247879533. The reversal of 1247879476 is 6749787421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1240448400 + 7431076 = 35220^2 + 2726^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247879471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155984931 + ... + 155984938.

Almost surely, 2^1247879476 is an apocalyptic number.

It is an amenable number.

1247879476 is a deficient number, since it is larger than the sum of its proper divisors (935909614).

1247879476 is a wasteful number, since it uses less digits than its factorization.

1247879476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311969873 (or 311969871 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 55.

The square root of 1247879476 is about 35325.3375921590. The cubic root of 1247879476 is about 1076.6078628446.

The spelling of 1247879476 in words is "one billion, two hundred forty-seven million, eight hundred seventy-nine thousand, four hundred seventy-six".