1057115291 has 4 divisors (see below), whose sum is σ = 1057258800. Its totient is φ = 1056971784.

The previous prime is 1057115287. The next prime is 1057115309. The reversal of 1057115291 is 1925117501.

It is a happy number.

1057115291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1925117501 = 71 ⋅27114331.

It is a cyclic number.

It is not a de Polignac number, because 1057115291 - 2² = 1057115287 is a prime.

It is a super-2 number, since 2×1057115291² = 2234985476932029362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057175291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60071 + ... + 75648.

It is an arithmetic number, because the mean of its divisors is an integer number (264314700).

Almost surely, 2^1057115291 is an apocalyptic number.

1057115291 is a deficient number, since it is larger than the sum of its proper divisors (143509).

1057115291 is an equidigital number, since it uses as much as digits as its factorization.

1057115291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143508.

The product of its (nonzero) digits is 3150, while the sum is 32.

The square root of 1057115291 is about 32513.3094439800. The cubic root of 1057115291 is about 1018.6870493126.

The spelling of 1057115291 in words is "one billion, fifty-seven million, one hundred fifteen thousand, two hundred ninety-one".