1239231 has 8 divisors (see below), whose sum is σ = 1888384. Its totient is φ = 708120.

The previous prime is 1239229. The next prime is 1239239. The reversal of 1239231 is 1329321.

It is a happy number.

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

It is not a de Polignac number, because 1239231 - 2¹ = 1239229 is a prime.

It is a super-2 number, since 2×1239231² = 3071386942722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 59011 = 1239231 / (1 + 2 + 3 + 9 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1239198 and 1239207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239239) 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 7 ways as a sum of consecutive naturals, for example, 29485 + ... + 29526.

It is an arithmetic number, because the mean of its divisors is an integer number (236048).

2^1239231 is an apocalyptic number.

1239231 is a deficient number, since it is larger than the sum of its proper divisors (649153).

1239231 is an equidigital number, since it uses as much as digits as its factorization.

1239231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59021.

The product of its digits is 324, while the sum is 21.

The square root of 1239231 is about 1113.2075278222. The cubic root of 1239231 is about 107.4114937642.

The spelling of 1239231 in words is "one million, two hundred thirty-nine thousand, two hundred thirty-one".