1215001300 has 72 divisors (see below), whose sum is σ = 2682953280. Its totient is φ = 477523200.

The previous prime is 1215001297. The next prime is 1215001327. The reversal of 1215001300 is 31005121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1877577 + ... + 1878223.

It is an arithmetic number, because the mean of its divisors is an integer number (37263240).

Almost surely, 2^1215001300 is an apocalyptic number.

1215001300 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 1215001300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341476640).

1215001300 is an abundant number, since it is smaller than the sum of its proper divisors (1467951980).

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

1215001300 is a wasteful number, since it uses less digits than its factorization.

1215001300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1215001300 is about 34856.8687635594. The cubic root of 1215001300 is about 1067.0683719198.

Adding to 1215001300 its reverse (31005121), we get a palindrome (1246006421).

The spelling of 1215001300 in words is "one billion, two hundred fifteen million, one thousand, three hundred".