1215541002 has 16 divisors (see below), whose sum is σ = 2618088480. Its totient is φ = 374012592.

The previous prime is 1215540973. The next prime is 1215541013. The reversal of 1215541002 is 2001455121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215541002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7791852 + ... + 7792007.

It is an arithmetic number, because the mean of its divisors is an integer number (163630530).

Almost surely, 2^1215541002 is an apocalyptic number.

1215541002 is an abundant number, since it is smaller than the sum of its proper divisors (1402547478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215541002 is a wasteful number, since it uses less digits than its factorization.

1215541002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15583877.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1215541002 is about 34864.6095919630. The cubic root of 1215541002 is about 1067.2263453267.

Adding to 1215541002 its reverse (2001455121), we get a palindrome (3216996123).

The spelling of 1215541002 in words is "one billion, two hundred fifteen million, five hundred forty-one thousand, two".