1312215 has 8 divisors (see below), whose sum is σ = 2099568. Its totient is φ = 699840.

The previous prime is 1312211. The next prime is 1312229. The reversal of 1312215 is 5122131.

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

It is not a de Polignac number, because 1312215 - 2² = 1312211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 87481 = 1312215 / (1 + 3 + 1 + 2 + 2 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 1312194 and 1312203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312211) 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, 43726 + ... + 43755.

It is an arithmetic number, because the mean of its divisors is an integer number (262446).

2^1312215 is an apocalyptic number.

1312215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312215 is a deficient number, since it is larger than the sum of its proper divisors (787353).

1312215 is an equidigital number, since it uses as much as digits as its factorization.

1312215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87489.

The product of its digits is 60, while the sum is 15.

The square root of 1312215 is about 1145.5195327885. The cubic root of 1312215 is about 109.4800530794.

Adding to 1312215 its reverse (5122131), we get a palindrome (6434346).

It can be divided in two parts, 131 and 2215, that added together give a triangular number (2346 = T₆₈).

The spelling of 1312215 in words is "one million, three hundred twelve thousand, two hundred fifteen".