1215334120 has 256 divisors, whose sum is σ = 3715891200. Its totient is φ = 345461760.

The previous prime is 1215334091. The next prime is 1215334123. The reversal of 1215334120 is 214335121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1215334091 and 1215334100.

It is not an unprimeable number, because it can be changed into a prime (1215334123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5084961 + ... + 5085199.

It is an arithmetic number, because the mean of its divisors is an integer number (14515200).

Almost surely, 2^1215334120 is an apocalyptic number.

1215334120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215334120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1857945600).

1215334120 is an abundant number, since it is smaller than the sum of its proper divisors (2500557080).

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

1215334120 is a wasteful number, since it uses less digits than its factorization.

1215334120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1215334120 is about 34861.6425315848. The cubic root of 1215334120 is about 1067.1657954845.

Adding to 1215334120 its reverse (214335121), we get a palindrome (1429669241).

The spelling of 1215334120 in words is "one billion, two hundred fifteen million, three hundred thirty-four thousand, one hundred twenty".