1155291 has 8 divisors (see below), whose sum is σ = 1554960. Its totient is φ = 762912.

The previous prime is 1155263. The next prime is 1155293. The reversal of 1155291 is 1925511.

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

It is not a de Polignac number, because 1155291 - 2¹⁰ = 1154267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155293) 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, 1440 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (194370).

2^1155291 is an apocalyptic number.

1155291 is a deficient number, since it is larger than the sum of its proper divisors (399669).

1155291 is a wasteful number, since it uses less digits than its factorization.

1155291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645.

The product of its digits is 450, while the sum is 24.

The square root of 1155291 is about 1074.8446399364. The cubic root of 1155291 is about 104.9293856278.

The spelling of 1155291 in words is "one million, one hundred fifty-five thousand, two hundred ninety-one".