1213231 has 8 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 1169280.

The previous prime is 1213213. The next prime is 1213241. The reversal of 1213231 is 1323121.

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 1213231 - 2⁹ = 1212719 is a prime.

It is a super-2 number, since 2×1213231² = 2943858918722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213241) 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, 5091 + ... + 5323.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

2^1213231 is an apocalyptic number.

1213231 is a deficient number, since it is larger than the sum of its proper divisors (44753).

1213231 is a wasteful number, since it uses less digits than its factorization.

1213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its digits is 36, while the sum is 13.

The square root of 1213231 is about 1101.4676572646. The cubic root of 1213231 is about 106.6549867853.

Adding to 1213231 its reverse (1323121), we get a palindrome (2536352).

It can be divided in two parts, 1213 and 231, that added together give a square (1444 = 38²).

The spelling of 1213231 in words is "one million, two hundred thirteen thousand, two hundred thirty-one".