1157086405 has 4 divisors (see below), whose sum is σ = 1388503692. Its totient is φ = 925669120.

The previous prime is 1157086393. The next prime is 1157086409. The reversal of 1157086405 is 5046807511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5046807511 = 37 ⋅136400203.

It can be written as a sum of positive squares in 2 ways, for example, as 268927201 + 888159204 = 16399^2 + 29802^2 .

It is not a de Polignac number, because 1157086405 - 2¹⁵ = 1157053637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157086409) 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, 115708636 + ... + 115708645.

It is an arithmetic number, because the mean of its divisors is an integer number (347125923).

Almost surely, 2^1157086405 is an apocalyptic number.

It is an amenable number.

1157086405 is a deficient number, since it is larger than the sum of its proper divisors (231417287).

1157086405 is an equidigital number, since it uses as much as digits as its factorization.

1157086405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231417286.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1157086405 is about 34015.9727922045. The cubic root of 1157086405 is about 1049.8371342252.

The spelling of 1157086405 in words is "one billion, one hundred fifty-seven million, eighty-six thousand, four hundred five".