1215948115 has 4 divisors (see below), whose sum is σ = 1459137744. Its totient is φ = 972758488.

The previous prime is 1215948113. The next prime is 1215948119. The reversal of 1215948115 is 5118495121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1215948115 - 2¹ = 1215948113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215948113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121594807 + ... + 121594816.

It is an arithmetic number, because the mean of its divisors is an integer number (364784436).

Almost surely, 2^1215948115 is an apocalyptic number.

1215948115 is a deficient number, since it is larger than the sum of its proper divisors (243189629).

1215948115 is an equidigital number, since it uses as much as digits as its factorization.

1215948115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243189628.

The product of its digits is 14400, while the sum is 37.

The square root of 1215948115 is about 34870.4475881799. The cubic root of 1215948115 is about 1067.3454783497.

The spelling of 1215948115 in words is "one billion, two hundred fifteen million, nine hundred forty-eight thousand, one hundred fifteen".