1157091 has 8 divisors (see below), whose sum is σ = 1661520. Its totient is φ = 712032.

The previous prime is 1157077. The next prime is 1157099. The reversal of 1157091 is 1907511.

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

It is not a de Polignac number, because 1157091 - 2⁵ = 1157059 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1157099) 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, 14796 + ... + 14873.

It is an arithmetic number, because the mean of its divisors is an integer number (207690).

2^1157091 is an apocalyptic number.

1157091 is a deficient number, since it is larger than the sum of its proper divisors (504429).

1157091 is a wasteful number, since it uses less digits than its factorization.

1157091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29685.

The product of its (nonzero) digits is 315, while the sum is 24.

The square root of 1157091 is about 1075.6816443539. The cubic root of 1157091 is about 104.9838523921.

The spelling of 1157091 in words is "one million, one hundred fifty-seven thousand, ninety-one".