1216315 has 4 divisors (see below), whose sum is σ = 1459584. Its totient is φ = 973048.

The previous prime is 1216277. The next prime is 1216337. The reversal of 1216315 is 5136121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216315 is a prime.

It is a Duffinian number.

1216315 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1216292 and 1216301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121627 + ... + 121636.

It is an arithmetic number, because the mean of its divisors is an integer number (364896).

2^1216315 is an apocalyptic number.

1216315 is a deficient number, since it is larger than the sum of its proper divisors (243269).

1216315 is an equidigital number, since it uses as much as digits as its factorization.

1216315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243268.

The product of its digits is 180, while the sum is 19.

The square root of 1216315 is about 1102.8667190554. The cubic root of 1216315 is about 106.7452816720.

The spelling of 1216315 in words is "one million, two hundred sixteen thousand, three hundred fifteen".