1218231 has 24 divisors (see below), whose sum is σ = 2050464. Its totient is φ = 682560.

The previous prime is 1218221. The next prime is 1218247. The reversal of 1218231 is 1328121.

It is not a de Polignac number, because 1218231 - 2⁵ = 1218199 is a prime.

It is a super-2 number, since 2×1218231² = 2968173538722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218211) 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, 3685 + ... + 4001.

It is an arithmetic number, because the mean of its divisors is an integer number (85436).

2^1218231 is an apocalyptic number.

1218231 is a deficient number, since it is larger than the sum of its proper divisors (832233).

1218231 is a wasteful number, since it uses less digits than its factorization.

1218231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 388 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1218231 is about 1103.7350225484. The cubic root of 1218231 is about 106.8013024291.

The spelling of 1218231 in words is "one million, two hundred eighteen thousand, two hundred thirty-one".