1231345 has 8 divisors (see below), whose sum is σ = 1483776. Its totient is φ = 980976.

The previous prime is 1231339. The next prime is 1231357. The reversal of 1231345 is 5431321.

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 1231345 - 2³ = 1231337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (185472).

2^1231345 is an apocalyptic number.

It is an amenable number.

1231345 is a deficient number, since it is larger than the sum of its proper divisors (252431).

1231345 is an equidigital number, since it uses as much as digits as its factorization.

1231345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its digits is 360, while the sum is 19.

The square root of 1231345 is about 1109.6598577943. The cubic root of 1231345 is about 107.1831666317.

Adding to 1231345 its reverse (5431321), we get a palindrome (6662666).

The spelling of 1231345 in words is "one million, two hundred thirty-one thousand, three hundred forty-five".