1215025001 has 2 divisors, whose sum is σ = 1215025002. Its totient is φ = 1215025000.

The previous prime is 1215024953. The next prime is 1215025013. The reversal of 1215025001 is 1005205121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 987467776 + 227557225 = 31424^2 + 15085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215025001 - 2¹⁰ = 1215023977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1215025081) by changing a digit.

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 as a sum of consecutive naturals, namely, 607512500 + 607512501.

It is an arithmetic number, because the mean of its divisors is an integer number (607512501).

Almost surely, 2^1215025001 is an apocalyptic number.

It is an amenable number.

1215025001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215025001 is an equidigital number, since it uses as much as digits as its factorization.

1215025001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1215025001 is about 34857.2087379354. The cubic root of 1215025001 is about 1067.0753103001.

The spelling of 1215025001 in words is "one billion, two hundred fifteen million, twenty-five thousand, one".