1311215 has 8 divisors (see below), whose sum is σ = 1582848. Its totient is φ = 1042720.

The previous prime is 1311181. The next prime is 1311217. The reversal of 1311215 is 5121131.

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

It is a de Polignac number, because none of the positive numbers 2^k-1311215 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311217) 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, 269 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (197856).

2^1311215 is an apocalyptic number.

1311215 is a deficient number, since it is larger than the sum of its proper divisors (271633).

1311215 is a wasteful number, since it uses less digits than its factorization.

1311215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569.

The product of its digits is 30, while the sum is 14.

The square root of 1311215 is about 1145.0829664265. The cubic root of 1311215 is about 109.4522355151.

Adding to 1311215 its reverse (5121131), we get a palindrome (6432346).

The spelling of 1311215 in words is "one million, three hundred eleven thousand, two hundred fifteen".