1212517085 has 8 divisors (see below), whose sum is σ = 1566945240. Its totient is φ = 895397184.

The previous prime is 1212517049. The next prime is 1212517153. The reversal of 1212517085 is 5807152121.

It can be written as a sum of positive squares in 4 ways, for example, as 72914521 + 1139602564 = 8539^2 + 33758^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1212517085 - 2⁶ = 1212517021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9326990 + ... + 9327119.

It is an arithmetic number, because the mean of its divisors is an integer number (195868155).

Almost surely, 2^1212517085 is an apocalyptic number.

It is an amenable number.

1212517085 is a deficient number, since it is larger than the sum of its proper divisors (354428155).

1212517085 is a wasteful number, since it uses less digits than its factorization.

1212517085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18654127.

The product of its (nonzero) digits is 5600, while the sum is 32.

The square root of 1212517085 is about 34821.2160183989. The cubic root of 1212517085 is about 1066.3406262089.

The spelling of 1212517085 in words is "one billion, two hundred twelve million, five hundred seventeen thousand, eighty-five".