1312015 has 8 divisors (see below), whose sum is σ = 1604448. Its totient is φ = 1029600.

The previous prime is 1312001. The next prime is 1312019. The reversal of 1312015 is 5102131.

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

It is not a de Polignac number, because 1312015 - 2⁹ = 1311503 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1311986 and 1312004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312019) 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, 2211 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (200556).

2^1312015 is an apocalyptic number.

1312015 is a deficient number, since it is larger than the sum of its proper divisors (292433).

1312015 is an equidigital number, since it uses as much as digits as its factorization.

1312015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1312015 is about 1145.4322328274. The cubic root of 1312015 is about 109.4744906974.

Adding to 1312015 its reverse (5102131), we get a palindrome (6414146).

The spelling of 1312015 in words is "one million, three hundred twelve thousand, fifteen".