1216231 has 8 divisors (see below), whose sum is σ = 1332720. Its totient is φ = 1104768.

The previous prime is 1216213. The next prime is 1216249. The reversal of 1216231 is 1326121.

It is an interprime number because it is at equal distance from previous prime (1216213) and next prime (1216249).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216231 - 2⁹ = 1215719 is a prime.

It is a super-2 number, since 2×1216231² = 2958435690722, which contains 22 as substring.

It is a Duffinian number.

1216231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741 + ... + 1726.

It is an arithmetic number, because the mean of its divisors is an integer number (166590).

2^1216231 is an apocalyptic number.

1216231 is a deficient number, since it is larger than the sum of its proper divisors (116489).

1216231 is a wasteful number, since it uses less digits than its factorization.

1216231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513.

The product of its digits is 72, while the sum is 16.

The square root of 1216231 is about 1102.8286358270. The cubic root of 1216231 is about 106.7428243014.

The spelling of 1216231 in words is "one million, two hundred sixteen thousand, two hundred thirty-one".