1155231 has 24 divisors (see below), whose sum is σ = 2081664. Its totient is φ = 599760.

The previous prime is 1155223. The next prime is 1155233. The reversal of 1155231 is 1325511.

It is not a de Polignac number, because 1155231 - 2³ = 1155223 is a prime.

It is a super-2 number, since 2×1155231² = 2669117326722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (86736).

2^1155231 is an apocalyptic number.

1155231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1155231 is a deficient number, since it is larger than the sum of its proper divisors (926433).

1155231 is a wasteful number, since it uses less digits than its factorization.

1155231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691 (or 1688 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1155231 is about 1074.8167285635. The cubic root of 1155231 is about 104.9275690950.

The spelling of 1155231 in words is "one million, one hundred fifty-five thousand, two hundred thirty-one".