1215457697 has 2 divisors, whose sum is σ = 1215457698. Its totient is φ = 1215457696.

The previous prime is 1215457681. The next prime is 1215457717. The reversal of 1215457697 is 7967545121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214940736 + 516961 = 34856^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215457697 - 2⁴ = 1215457681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215657697) by changing a digit.

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 as a sum of consecutive naturals, namely, 607728848 + 607728849.

It is an arithmetic number, because the mean of its divisors is an integer number (607728849).

Almost surely, 2^1215457697 is an apocalyptic number.

It is an amenable number.

1215457697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215457697 is an equidigital number, since it uses as much as digits as its factorization.

1215457697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 47.

The square root of 1215457697 is about 34863.4148786375. The cubic root of 1215457697 is about 1067.2019645993.

The spelling of 1215457697 in words is "one billion, two hundred fifteen million, four hundred fifty-seven thousand, six hundred ninety-seven".