1215231 has 16 divisors (see below), whose sum is σ = 1704960. Its totient is φ = 768960.

The previous prime is 1215229. The next prime is 1215239. The reversal of 1215231 is 1325121.

It is not a de Polignac number, because 1215231 - 2¹ = 1215229 is a prime.

It is a super-2 number, since 2×1215231² = 2953572766722, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1215231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215239) 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 15 ways as a sum of consecutive naturals, for example, 6700 + ... + 6878.

It is an arithmetic number, because the mean of its divisors is an integer number (106560).

2^1215231 is an apocalyptic number.

1215231 is a deficient number, since it is larger than the sum of its proper divisors (489729).

1215231 is a wasteful number, since it uses less digits than its factorization.

1215231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 60, while the sum is 15.

The square root of 1215231 is about 1102.3751630003. The cubic root of 1215231 is about 106.7135611947.

The spelling of 1215231 in words is "one million, two hundred fifteen thousand, two hundred thirty-one".