1215134361 has 24 divisors (see below), whose sum is σ = 2010008000. Its totient is φ = 692953056.

The previous prime is 1215134357. The next prime is 1215134383. The reversal of 1215134361 is 1634315121.

It is a happy number.

1215134361 is a `hidden beast` number, since 1 + 215 + 13 + 436 + 1 = 666.

It is not a de Polignac number, because 1215134361 - 2² = 1215134357 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1215134351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12111 + ... + 50763.

Almost surely, 2^1215134361 is an apocalyptic number.

It is an amenable number.

1215134361 is a deficient number, since it is larger than the sum of its proper divisors (794873639).

1215134361 is a wasteful number, since it uses less digits than its factorization.

1215134361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39165 (or 39162 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1215134361 is about 34858.7773881988. Note that the first 3 decimals coincide. The cubic root of 1215134361 is about 1067.1073238677.

Adding to 1215134361 its reverse (1634315121), we get a palindrome (2849449482).

The spelling of 1215134361 in words is "one billion, two hundred fifteen million, one hundred thirty-four thousand, three hundred sixty-one".