1157132091 has 16 divisors (see below), whose sum is σ = 1638426240. Its totient is φ = 724348800.

The previous prime is 1157132089. The next prime is 1157132113. The reversal of 1157132091 is 1902317511.

It is not a de Polignac number, because 1157132091 - 2¹ = 1157132089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157132051) 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, 83385 + ... + 96266.

It is an arithmetic number, because the mean of its divisors is an integer number (102401640).

Almost surely, 2^1157132091 is an apocalyptic number.

1157132091 is a deficient number, since it is larger than the sum of its proper divisors (481294149).

1157132091 is a wasteful number, since it uses less digits than its factorization.

1157132091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179786.

The product of its (nonzero) digits is 1890, while the sum is 30.

The square root of 1157132091 is about 34016.6443230369. The cubic root of 1157132091 is about 1049.8509511789.

The spelling of 1157132091 in words is "one billion, one hundred fifty-seven million, one hundred thirty-two thousand, ninety-one".