1115291 has 8 divisors (see below), whose sum is σ = 1173744. Its totient is φ = 1058400.

The previous prime is 1115273. The next prime is 1115297. The reversal of 1115291 is 1925111.

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

It is a cyclic number.

It is not a de Polignac number, because 1115291 - 2⁶ = 1115227 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115297) 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, 1241 + ... + 1941.

It is an arithmetic number, because the mean of its divisors is an integer number (146718).

2^1115291 is an apocalyptic number.

1115291 is a deficient number, since it is larger than the sum of its proper divisors (58453).

1115291 is an equidigital number, since it uses as much as digits as its factorization.

1115291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781.

The product of its digits is 90, while the sum is 20.

The square root of 1115291 is about 1056.0733876014. The cubic root of 1115291 is about 103.7041332072.

Subtracting from 1115291 its sum of digits (20), we obtain a triangular number (1115271 = T₁₄₉₃).

The spelling of 1115291 in words is "one million, one hundred fifteen thousand, two hundred ninety-one".