1215145361 has 16 divisors (see below), whose sum is σ = 1339804800. Its totient is φ = 1096939008.

The previous prime is 1215145291. The next prime is 1215145369. The reversal of 1215145361 is 1635415121.

It is a de Polignac number, because none of the positive numbers 2^k-1215145361 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1215145369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112385 + ... + 122721.

It is an arithmetic number, because the mean of its divisors is an integer number (83737800).

Almost surely, 2^1215145361 is an apocalyptic number.

It is an amenable number.

1215145361 is a deficient number, since it is larger than the sum of its proper divisors (124659439).

1215145361 is a wasteful number, since it uses less digits than its factorization.

1215145361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10648.

The product of its digits is 3600, while the sum is 29.

The square root of 1215145361 is about 34858.9351673283. The cubic root of 1215145361 is about 1067.1105438532.

The spelling of 1215145361 in words is "one billion, two hundred fifteen million, one hundred forty-five thousand, three hundred sixty-one".