1216062685 has 4 divisors (see below), whose sum is σ = 1459275228. Its totient is φ = 972850144.

The previous prime is 1216062677. The next prime is 1216062707. The reversal of 1216062685 is 5862606121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 173870596 + 1042192089 = 13186^2 + 32283^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216062685 - 2³ = 1216062677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121606264 + ... + 121606273.

It is an arithmetic number, because the mean of its divisors is an integer number (364818807).

Almost surely, 2^1216062685 is an apocalyptic number.

It is an amenable number.

1216062685 is a deficient number, since it is larger than the sum of its proper divisors (243212543).

1216062685 is an equidigital number, since it uses as much as digits as its factorization.

1216062685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243212542.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1216062685 is about 34872.0903445721. The cubic root of 1216062685 is about 1067.3790000461.

The spelling of 1216062685 in words is "one billion, two hundred sixteen million, sixty-two thousand, six hundred eighty-five".