1247388412 has 18 divisors (see below), whose sum is σ = 2201523072. Its totient is φ = 618388344.

The previous prime is 1247388403. The next prime is 1247388427. The reversal of 1247388412 is 2148837421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 795253 + ... + 796819.

Almost surely, 2^1247388412 is an apocalyptic number.

It is an amenable number.

1247388412 is a deficient number, since it is larger than the sum of its proper divisors (954134660).

1247388412 is an equidigital number, since it uses as much as digits as its factorization.

1247388412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265 (or 1696 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 1247388412 is about 35318.3863164783. The cubic root of 1247388412 is about 1076.4666225144.

The spelling of 1247388412 in words is "one billion, two hundred forty-seven million, three hundred eighty-eight thousand, four hundred twelve".