1156231 has 2 divisors, whose sum is σ = 1156232. Its totient is φ = 1156230.

The previous prime is 1156229. The next prime is 1156249. The reversal of 1156231 is 1326511.

It is a weak prime.

It is an emirp because it is prime and its reverse (1326511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1156231 - 2¹ = 1156229 is a prime.

It is a super-2 number, since 2×1156231² = 2673740250722, which contains 22 as substring.

Together with 1156229, it forms a pair of twin primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1156199 and 1156208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578115 + 578116.

It is an arithmetic number, because the mean of its divisors is an integer number (578116).

2^1156231 is an apocalyptic number.

1156231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156231 is an equidigital number, since it uses as much as digits as its factorization.

1156231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 19.

The square root of 1156231 is about 1075.2818235235. The cubic root of 1156231 is about 104.9578364347.

The spelling of 1156231 in words is "one million, one hundred fifty-six thousand, two hundred thirty-one".