1215485541 has 16 divisors (see below), whose sum is σ = 1858808320. Its totient is φ = 784183680.

The previous prime is 1215485539. The next prime is 1215485543. The reversal of 1215485541 is 1455845121.

1215485541 is a `hidden beast` number, since 1 + 21 + 548 + 55 + 41 = 666.

It is an interprime number because it is at equal distance from previous prime (1215485539) and next prime (1215485543).

It is not a de Polignac number, because 1215485541 - 2¹ = 1215485539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215485496 and 1215485505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215485543) 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, 725260 + ... + 726933.

It is an arithmetic number, because the mean of its divisors is an integer number (116175520).

Almost surely, 2^1215485541 is an apocalyptic number.

It is an amenable number.

1215485541 is a deficient number, since it is larger than the sum of its proper divisors (643322779).

1215485541 is a wasteful number, since it uses less digits than its factorization.

1215485541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452233 (or 1452227 counting only the distinct ones).

The product of its digits is 32000, while the sum is 36.

The square root of 1215485541 is about 34863.8142061364. The cubic root of 1215485541 is about 1067.2101137776.

The spelling of 1215485541 in words is "one billion, two hundred fifteen million, four hundred eighty-five thousand, five hundred forty-one".