1215648001 has 2 divisors, whose sum is σ = 1215648002. Its totient is φ = 1215648000.

The previous prime is 1215647929. The next prime is 1215648029. The reversal of 1215648001 is 1008465121.

It is an a-pointer prime, because the next prime (1215648029) can be obtained adding 1215648001 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185011776 + 30636225 = 34424^2 + 5535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215648001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215648041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607824000 + 607824001.

It is an arithmetic number, because the mean of its divisors is an integer number (607824001).

Almost surely, 2^1215648001 is an apocalyptic number.

It is an amenable number.

1215648001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215648001 is an equidigital number, since it uses as much as digits as its factorization.

1215648001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1215648001 is about 34866.1440512139. The cubic root of 1215648001 is about 1067.2576589013.

The spelling of 1215648001 in words is "one billion, two hundred fifteen million, six hundred forty-eight thousand, one".