1215001017 has 12 divisors (see below), whose sum is σ = 1758050580. Its totient is φ = 808593408.

The previous prime is 1215001003. The next prime is 1215001049. The reversal of 1215001017 is 7101005121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1083463056 + 131537961 = 32916^2 + 11469^2 .

It is not a de Polignac number, because 1215001017 - 2⁴ = 1215001001 is a prime.

It is a super-2 number, since 2×1215001017² = 2952454942622068578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1215081017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111792 + ... + 122177.

It is an arithmetic number, because the mean of its divisors is an integer number (146504215).

Almost surely, 2^1215001017 is an apocalyptic number.

It is an amenable number.

1215001017 is a deficient number, since it is larger than the sum of its proper divisors (543049563).

1215001017 is a wasteful number, since it uses less digits than its factorization.

1215001017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234552 (or 234549 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 1215001017 is about 34856.8647041010. The cubic root of 1215001017 is about 1067.0682890721.

Adding to 1215001017 its reverse (7101005121), we get a palindrome (8316006138).

The spelling of 1215001017 in words is "one billion, two hundred fifteen million, one thousand, seventeen".