1215276497 has 2 divisors, whose sum is σ = 1215276498. Its totient is φ = 1215276496.

The previous prime is 1215276487. The next prime is 1215276511. The reversal of 1215276497 is 7946725121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1182740881 + 32535616 = 34391^2 + 5704^2 .

It is an emirp because it is prime and its reverse (7946725121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215276497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215276427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607638248 + 607638249.

It is an arithmetic number, because the mean of its divisors is an integer number (607638249).

Almost surely, 2^1215276497 is an apocalyptic number.

It is an amenable number.

1215276497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215276497 is an equidigital number, since it uses as much as digits as its factorization.

1215276497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 1215276497 is about 34860.8160690481. The cubic root of 1215276497 is about 1067.1489292676.

The spelling of 1215276497 in words is "one billion, two hundred fifteen million, two hundred seventy-six thousand, four hundred ninety-seven".