1215600450 has 48 divisors (see below), whose sum is σ = 3017619360. Its totient is φ = 323845120.

The previous prime is 1215600403. The next prime is 1215600461. The reversal of 1215600450 is 540065121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215600450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179221 + ... + 185879.

It is an arithmetic number, because the mean of its divisors is an integer number (62867070).

Almost surely, 2^1215600450 is an apocalyptic number.

1215600450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215600450 is an abundant number, since it is smaller than the sum of its proper divisors (1802018910).

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

1215600450 is a wasteful number, since it uses less digits than its factorization.

1215600450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891 (or 7886 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1215600450 is about 34865.4621366188. The cubic root of 1215600450 is about 1067.2437431870.

Adding to 1215600450 its reverse (540065121), we get a palindrome (1755665571).

The spelling of 1215600450 in words is "one billion, two hundred fifteen million, six hundred thousand, four hundred fifty".