1057313247 has 8 divisors (see below), whose sum is σ = 1413433344. Its totient is φ = 703034328.

The previous prime is 1057313237. The next prime is 1057313261. The reversal of 1057313247 is 7423137501.

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

It is a de Polignac number, because none of the positive numbers 2^k-1057313247 is a prime.

It is a super-2 number, since 2×1057313247² = 2235822604563366018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057313237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458953 + ... + 461250.

It is an arithmetic number, because the mean of its divisors is an integer number (176679168).

Almost surely, 2^1057313247 is an apocalyptic number.

1057313247 is a deficient number, since it is larger than the sum of its proper divisors (356120097).

1057313247 is an equidigital number, since it uses as much as digits as its factorization.

1057313247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920589.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 1057313247 is about 32516.3535317231. The cubic root of 1057313247 is about 1018.7506319792.

The spelling of 1057313247 in words is "one billion, fifty-seven million, three hundred thirteen thousand, two hundred forty-seven".