1156291 has 2 divisors, whose sum is σ = 1156292. Its totient is φ = 1156290.

The previous prime is 1156271. The next prime is 1156297. The reversal of 1156291 is 1926511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1156291 - 2¹¹ = 1154243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578145 + 578146.

It is an arithmetic number, because the mean of its divisors is an integer number (578146).

2^1156291 is an apocalyptic number.

1156291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156291 is an equidigital number, since it uses as much as digits as its factorization.

1156291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 25.

The square root of 1156291 is about 1075.3097228241. The cubic root of 1156291 is about 104.9596519201.

The spelling of 1156291 in words is "one million, one hundred fifty-six thousand, two hundred ninety-one".