1145231 has 4 divisors (see below), whose sum is σ = 1162392. Its totient is φ = 1128072.

The previous prime is 1145227. The next prime is 1145269. The reversal of 1145231 is 1325411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1325411 = 797 ⋅1663.

It is a cyclic number.

It is not a de Polignac number, because 1145231 - 2² = 1145227 is a prime.

It is a super-2 number, since 2×1145231² = 2623108086722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8480 + ... + 8613.

It is an arithmetic number, because the mean of its divisors is an integer number (290598).

2^1145231 is an apocalyptic number.

1145231 is a deficient number, since it is larger than the sum of its proper divisors (17161).

1145231 is an equidigital number, since it uses as much as digits as its factorization.

1145231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17160.

The product of its digits is 120, while the sum is 17.

The square root of 1145231 is about 1070.1546617195. The cubic root of 1145231 is about 104.6239305607.

The spelling of 1145231 in words is "one million, one hundred forty-five thousand, two hundred thirty-one".