1154891 has 4 divisors (see below), whose sum is σ = 1157832. Its totient is φ = 1151952.

The previous prime is 1154887. The next prime is 1154893. The reversal of 1154891 is 1984511.

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 1154891 - 2² = 1154887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154893) 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, 770 + ... + 1703.

It is an arithmetic number, because the mean of its divisors is an integer number (289458).

2^1154891 is an apocalyptic number.

1154891 is a deficient number, since it is larger than the sum of its proper divisors (2941).

1154891 is an equidigital number, since it uses as much as digits as its factorization.

1154891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940.

The product of its digits is 1440, while the sum is 29.

The square root of 1154891 is about 1074.6585504243. The cubic root of 1154891 is about 104.9172742206.

The spelling of 1154891 in words is "one million, one hundred fifty-four thousand, eight hundred ninety-one".