1216013 has 2 divisors, whose sum is σ = 1216014. Its totient is φ = 1216012.

The previous prime is 1216009. The next prime is 1216021. The reversal of 1216013 is 3106121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1087849 + 128164 = 1043^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216013 - 2² = 1216009 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608006 + 608007.

It is an arithmetic number, because the mean of its divisors is an integer number (608007).

2^1216013 is an apocalyptic number.

It is an amenable number.

1216013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216013 is an equidigital number, since it uses as much as digits as its factorization.

1216013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1216013 is about 1102.7297946460. The cubic root of 1216013 is about 106.7364463118.

The spelling of 1216013 in words is "one million, two hundred sixteen thousand, thirteen".