1156271 has 2 divisors, whose sum is σ = 1156272. Its totient is φ = 1156270.

The previous prime is 1156261. The next prime is 1156291. The reversal of 1156271 is 1726511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1156271 - 2¹⁰ = 1155247 is a prime.

It is a super-3 number, since 3×1156271³ = 4637673335643871533, which contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578135 + 578136.

It is an arithmetic number, because the mean of its divisors is an integer number (578136).

2^1156271 is an apocalyptic number.

1156271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156271 is an equidigital number, since it uses as much as digits as its factorization.

1156271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 23.

The square root of 1156271 is about 1075.3004231376. The cubic root of 1156271 is about 104.9590467653.

The spelling of 1156271 in words is "one million, one hundred fifty-six thousand, two hundred seventy-one".