1215150025 has 12 divisors (see below), whose sum is σ = 1558745100. Its totient is φ = 938598080.

The previous prime is 1215149993. The next prime is 1215150047. The reversal of 1215150025 is 5200515121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 144 + 1215149881 = 12^2 + 34859^2 .

It is not a de Polignac number, because 1215150025 - 2⁵ = 1215149993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215149978 and 1215150005.

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 11 ways as a sum of consecutive naturals, for example, 837310 + ... + 838759.

It is an arithmetic number, because the mean of its divisors is an integer number (129895425).

Almost surely, 2^1215150025 is an apocalyptic number.

It is an amenable number.

1215150025 is a deficient number, since it is larger than the sum of its proper divisors (343595075).

1215150025 is a wasteful number, since it uses less digits than its factorization.

1215150025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676108 (or 1676103 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1215150025 is about 34859.0020654637. The cubic root of 1215150025 is about 1067.1119091212. Note that the first 3 decimals are identical.

Adding to 1215150025 its reverse (5200515121), we get a palindrome (6415665146).

The spelling of 1215150025 in words is "one billion, two hundred fifteen million, one hundred fifty thousand, twenty-five".