1215615141 has 48 divisors (see below), whose sum is σ = 2064942720. Its totient is φ = 704021760.

The previous prime is 1215615139. The next prime is 1215615143. The reversal of 1215615141 is 1415165121.

1215615141 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 615 + 1 + 41 = 666.

It is an interprime number because it is at equal distance from previous prime (1215615139) and next prime (1215615143).

It is not a de Polignac number, because 1215615141 - 2¹ = 1215615139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215615143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69736 + ... + 85406.

It is an arithmetic number, because the mean of its divisors is an integer number (43019640).

Almost surely, 2^1215615141 is an apocalyptic number.

It is an amenable number.

1215615141 is a deficient number, since it is larger than the sum of its proper divisors (849327579).

1215615141 is a wasteful number, since it uses less digits than its factorization.

1215615141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15723 (or 15704 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 1215615141 is about 34865.6728172568. The cubic root of 1215615141 is about 1067.2480425204.

The spelling of 1215615141 in words is "one billion, two hundred fifteen million, six hundred fifteen thousand, one hundred forty-one".