1215463867 has 2 divisors, whose sum is σ = 1215463868. Its totient is φ = 1215463866.

The previous prime is 1215463849. The next prime is 1215463883. The reversal of 1215463867 is 7683645121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215463867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215463567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607731933 + 607731934.

It is an arithmetic number, because the mean of its divisors is an integer number (607731934).

Almost surely, 2^1215463867 is an apocalyptic number.

1215463867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215463867 is an equidigital number, since it uses as much as digits as its factorization.

1215463867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 1215463867 is about 34863.5033667014. The cubic root of 1215463867 is about 1067.2037704005.

The spelling of 1215463867 in words is "one billion, two hundred fifteen million, four hundred sixty-three thousand, eight hundred sixty-seven".