1247432974 has 4 divisors (see below), whose sum is σ = 1871149464. Its totient is φ = 623716486.

The previous prime is 1247432957. The next prime is 1247432983. The reversal of 1247432974 is 4792347421.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1247432974.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311858242 + ... + 311858245.

It is an arithmetic number, because the mean of its divisors is an integer number (467787366).

Almost surely, 2^1247432974 is an apocalyptic number.

1247432974 is a deficient number, since it is larger than the sum of its proper divisors (623716490).

1247432974 is an equidigital number, since it uses as much as digits as its factorization.

1247432974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623716489.

The product of its digits is 338688, while the sum is 43.

The square root of 1247432974 is about 35319.0171720562. The cubic root of 1247432974 is about 1076.4794410116.

The spelling of 1247432974 in words is "one billion, two hundred forty-seven million, four hundred thirty-two thousand, nine hundred seventy-four".