1154591 has 4 divisors (see below), whose sum is σ = 1166592. Its totient is φ = 1142592.

The previous prime is 1154581. The next prime is 1154603. The reversal of 1154591 is 1954511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1154591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1154591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154551) 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, 5855 + ... + 6048.

It is an arithmetic number, because the mean of its divisors is an integer number (291648).

2^1154591 is an apocalyptic number.

1154591 is a deficient number, since it is larger than the sum of its proper divisors (12001).

1154591 is an equidigital number, since it uses as much as digits as its factorization.

1154591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12000.

The product of its digits is 900, while the sum is 26.

The square root of 1154591 is about 1074.5189621407. The cubic root of 1154591 is about 104.9081888298.

The spelling of 1154591 in words is "one million, one hundred fifty-four thousand, five hundred ninety-one".