231245 has 8 divisors (see below), whose sum is σ = 317184. Its totient is φ = 158544.

The previous prime is 231241. The next prime is 231269. The reversal of 231245 is 542132.

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 231245 - 2² = 231241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231241) 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, 3269 + ... + 3338.

It is an arithmetic number, because the mean of its divisors is an integer number (39648).

2²³¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

231245 is a deficient number, since it is larger than the sum of its proper divisors (85939).

231245 is an equidigital number, since it uses as much as digits as its factorization.

231245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619.

The product of its digits is 240, while the sum is 17.

The square root of 231245 is about 480.8794027612. The cubic root of 231245 is about 61.3796089277.

Adding to 231245 its reverse (542132), we get a palindrome (773377).

The spelling of 231245 in words is "two hundred thirty-one thousand, two hundred forty-five".