1215000650 has 12 divisors (see below), whose sum is σ = 2259901302. Its totient is φ = 486000240.

The previous prime is 1215000641. The next prime is 1215000679. The reversal of 1215000650 is 560005121.

It can be written as a sum of positive squares in 3 ways, for example, as 1103634841 + 111365809 = 33221^2 + 10553^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 12149957 + ... + 12150056.

Almost surely, 2^1215000650 is an apocalyptic number.

1215000650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215000650 is a deficient number, since it is larger than the sum of its proper divisors (1044900652).

1215000650 is a wasteful number, since it uses less digits than its factorization.

1215000650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24300025 (or 24300020 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1215000650 is about 34856.8594397143. The cubic root of 1215000650 is about 1067.0681816335.

Adding to 1215000650 its reverse (560005121), we get a palindrome (1775005771).

The spelling of 1215000650 in words is "one billion, two hundred fifteen million, six hundred fifty", and thus it is an aban number.