1215081049 has 8 divisors (see below), whose sum is σ = 1495484480. Its totient is φ = 961382736.

The previous prime is 1215081047. The next prime is 1215081059. The reversal of 1215081049 is 9401805121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1215081049 - 2¹ = 1215081047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1215081049.

It is not an unprimeable number, because it can be changed into a prime (1215081041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6676179 + ... + 6676360.

It is an arithmetic number, because the mean of its divisors is an integer number (186935560).

Almost surely, 2^1215081049 is an apocalyptic number.

It is an amenable number.

1215081049 is a deficient number, since it is larger than the sum of its proper divisors (280403431).

1215081049 is a wasteful number, since it uses less digits than its factorization.

1215081049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352559.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1215081049 is about 34858.0126943577. The cubic root of 1215081049 is about 1067.0917177862.

The spelling of 1215081049 in words is "one billion, two hundred fifteen million, eighty-one thousand, forty-nine".