1216069 has 2 divisors, whose sum is σ = 1216070. Its totient is φ = 1216068.

The previous prime is 1216067. The next prime is 1216087. The reversal of 1216069 is 9606121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 113569 = 1050^2 + 337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216069 - 2¹ = 1216067 is a prime.

It is a super-2 number, since 2×1216069² = 2957647625522, which contains 22 as substring.

Together with 1216067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608034 + 608035.

It is an arithmetic number, because the mean of its divisors is an integer number (608035).

2^1216069 is an apocalyptic number.

It is an amenable number.

1216069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216069 is an equidigital number, since it uses as much as digits as its factorization.

1216069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1216069 is about 1102.7551858867. The cubic root of 1216069 is about 106.7380847672.

The spelling of 1216069 in words is "one million, two hundred sixteen thousand, sixty-nine".