1215463849 has 2 divisors, whose sum is σ = 1215463850. Its totient is φ = 1215463848.

The previous prime is 1215463829. The next prime is 1215463867. The reversal of 1215463849 is 9483645121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1031373225 + 184090624 = 32115^2 + 13568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215463849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215463829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607731924 + 607731925.

It is an arithmetic number, because the mean of its divisors is an integer number (607731925).

Almost surely, 2^1215463849 is an apocalyptic number.

It is an amenable number.

1215463849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215463849 is an equidigital number, since it uses as much as digits as its factorization.

1215463849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 1215463849 is about 34863.5031085518. The cubic root of 1215463849 is about 1067.2037651323.

The spelling of 1215463849 in words is "one billion, two hundred fifteen million, four hundred sixty-three thousand, eight hundred forty-nine".