1150891 has 4 divisors (see below), whose sum is σ = 1315312. Its totient is φ = 986472.

The previous prime is 1150879. The next prime is 1150909. The reversal of 1150891 is 1980511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1150891 - 2⁷ = 1150763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1150861) 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, 82200 + ... + 82213.

It is an arithmetic number, because the mean of its divisors is an integer number (328828).

2^1150891 is an apocalyptic number.

1150891 is a deficient number, since it is larger than the sum of its proper divisors (164421).

1150891 is an equidigital number, since it uses as much as digits as its factorization.

1150891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164420.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 1150891 is about 1072.7958799324. The cubic root of 1150891 is about 104.7960060537.

The spelling of 1150891 in words is "one million, one hundred fifty thousand, eight hundred ninety-one".