1247051290 has 8 divisors (see below), whose sum is σ = 2244692340. Its totient is φ = 498820512.

The previous prime is 1247051249. The next prime is 1247051321. The reversal of 1247051290 is 921507421.

It can be written as a sum of positive squares in 2 ways, for example, as 1197644449 + 49406841 = 34607^2 + 7029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62352555 + ... + 62352574.

Almost surely, 2^1247051290 is an apocalyptic number.

1247051290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247051290 is a deficient number, since it is larger than the sum of its proper divisors (997641050).

1247051290 is a wasteful number, since it uses less digits than its factorization.

1247051290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124705136.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1247051290 is about 35313.6133806780. The cubic root of 1247051290 is about 1076.3696376793.

The spelling of 1247051290 in words is "one billion, two hundred forty-seven million, fifty-one thousand, two hundred ninety".