1247475790 has 16 divisors (see below), whose sum is σ = 2449589040. Its totient is φ = 453627520.

The previous prime is 1247475781. The next prime is 1247475809. The reversal of 1247475790 is 975747421.

It is a super-2 number, since 2×1247475790² = 3112391693272248200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1247475790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5670235 + ... + 5670454.

It is an arithmetic number, because the mean of its divisors is an integer number (153099315).

Almost surely, 2^1247475790 is an apocalyptic number.

1247475790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247475790 is a deficient number, since it is larger than the sum of its proper divisors (1202113250).

1247475790 is a wasteful number, since it uses less digits than its factorization.

1247475790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340707.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 1247475790 is about 35319.6232992369. The cubic root of 1247475790 is about 1076.4917569749.

The spelling of 1247475790 in words is "one billion, two hundred forty-seven million, four hundred seventy-five thousand, seven hundred ninety".