157091 has 4 divisors (see below), whose sum is σ = 171384. Its totient is φ = 142800.

The previous prime is 157081. The next prime is 157103. The reversal of 157091 is 190751.

157091 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: 190751 = 11 ⋅17341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157091 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (157051) 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, 7130 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (42846).

2¹⁵⁷⁰⁹¹ is an apocalyptic number.

157091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157091 is a deficient number, since it is larger than the sum of its proper divisors (14293).

157091 is a wasteful number, since it uses less digits than its factorization.

157091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14292.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 157091 is about 396.3470701292. The cubic root of 157091 is about 53.9573279711.

It can be divided in two parts, 1570 and 91, that added together give a palindrome (1661).

The spelling of 157091 in words is "one hundred fifty-seven thousand, ninety-one".