1018231 has 4 divisors (see below), whose sum is σ = 1031200. Its totient is φ = 1005264.

The previous prime is 1018223. The next prime is 1018247. The reversal of 1018231 is 1328101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1018231 - 2³ = 1018223 is a prime.

It is a super-2 number, since 2×1018231² = 2073588738722, which contains 22 as substring.

It is a Duffinian number.

1018231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6366 + ... + 6523.

It is an arithmetic number, because the mean of its divisors is an integer number (257800).

2^1018231 is an apocalyptic number.

1018231 is a deficient number, since it is larger than the sum of its proper divisors (12969).

1018231 is an equidigital number, since it uses as much as digits as its factorization.

1018231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12968.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1018231 is about 1009.0743282831. The cubic root of 1018231 is about 100.6040439623.

The spelling of 1018231 in words is "one million, eighteen thousand, two hundred thirty-one".