1215250104 has 64 divisors (see below), whose sum is σ = 3147724800. Its totient is φ = 390513536.

The previous prime is 1215250097. The next prime is 1215250111. The reversal of 1215250104 is 4010525121.

It is an interprime number because it is at equal distance from previous prime (1215250097) and next prime (1215250111).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766897 + ... + 768479.

It is an arithmetic number, because the mean of its divisors is an integer number (49183200).

Almost surely, 2^1215250104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215250104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573862400).

1215250104 is an abundant number, since it is smaller than the sum of its proper divisors (1932474696).

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

1215250104 is a wasteful number, since it uses less digits than its factorization.

1215250104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724 (or 2720 counting only the distinct ones).

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

The square root of 1215250104 is about 34860.4375187690. The cubic root of 1215250104 is about 1067.1412038746.

Adding to 1215250104 its reverse (4010525121), we get a palindrome (5225775225).

The spelling of 1215250104 in words is "one billion, two hundred fifteen million, two hundred fifty thousand, one hundred four".