1312845 has 8 divisors (see below), whose sum is σ = 2100576. Its totient is φ = 700176.

The previous prime is 1312841. The next prime is 1312847. The reversal of 1312845 is 5482131.

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

It is not a de Polignac number, because 1312845 - 2² = 1312841 is a prime.

It is a Curzon number.

1312845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43747 + ... + 43776.

It is an arithmetic number, because the mean of its divisors is an integer number (262572).

2^1312845 is an apocalyptic number.

1312845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312845 is a deficient number, since it is larger than the sum of its proper divisors (787731).

1312845 is an equidigital number, since it uses as much as digits as its factorization.

1312845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87531.

The product of its digits is 960, while the sum is 24.

The square root of 1312845 is about 1145.7944841899. The cubic root of 1312845 is about 109.4975708892.

Adding to 1312845 its reverse (5482131), we get a palindrome (6794976).

The spelling of 1312845 in words is "one million, three hundred twelve thousand, eight hundred forty-five".