1157231 has 6 divisors (see below), whose sum is σ = 1180296. Its totient is φ = 1134600.

The previous prime is 1157227. The next prime is 1157237. The reversal of 1157231 is 1327511.

It is not a de Polignac number, because 1157231 - 2² = 1157227 is a prime.

It is a super-2 number, since 2×1157231² = 2678367174722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157237) 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 in 5 ways as a sum of consecutive naturals, for example, 3566 + ... + 3876.

It is an arithmetic number, because the mean of its divisors is an integer number (196716).

2^1157231 is an apocalyptic number.

1157231 is a deficient number, since it is larger than the sum of its proper divisors (23065).

1157231 is an frugal number, since it uses more digits than its factorization.

1157231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 372 counting only the distinct ones).

The product of its digits is 210, while the sum is 20.

The square root of 1157231 is about 1075.7467174015. The cubic root of 1157231 is about 104.9880863278.

The spelling of 1157231 in words is "one million, one hundred fifty-seven thousand, two hundred thirty-one".