1151291 has 4 divisors (see below), whose sum is σ = 1219032. Its totient is φ = 1083552.

The previous prime is 1151287. The next prime is 1151303. The reversal of 1151291 is 1921511.

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 1151291 - 2² = 1151287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151221) 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, 33845 + ... + 33878.

It is an arithmetic number, because the mean of its divisors is an integer number (304758).

2^1151291 is an apocalyptic number.

1151291 is a deficient number, since it is larger than the sum of its proper divisors (67741).

1151291 is an equidigital number, since it uses as much as digits as its factorization.

1151291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67740.

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

The square root of 1151291 is about 1072.9822924914. The cubic root of 1151291 is about 104.8081455025.

The spelling of 1151291 in words is "one million, one hundred fifty-one thousand, two hundred ninety-one".