1157268091 has 16 divisors (see below), whose sum is σ = 1380431808. Its totient is φ = 949478400.

The previous prime is 1157268071. The next prime is 1157268097. The reversal of 1157268091 is 1908627511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1157268091 - 2⁷ = 1157267963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157268097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22830 + ... + 53251.

It is an arithmetic number, because the mean of its divisors is an integer number (86276988).

Almost surely, 2^1157268091 is an apocalyptic number.

1157268091 is a deficient number, since it is larger than the sum of its proper divisors (223163717).

1157268091 is an equidigital number, since it uses as much as digits as its factorization.

1157268091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76182.

The product of its (nonzero) digits is 30240, while the sum is 40.

The square root of 1157268091 is about 34018.6432857044. The cubic root of 1157268091 is about 1049.8920799135.

The spelling of 1157268091 in words is "one billion, one hundred fifty-seven million, two hundred sixty-eight thousand, ninety-one".