1215632867 has 2 divisors, whose sum is σ = 1215632868. Its totient is φ = 1215632866.

The previous prime is 1215632861. The next prime is 1215632881. The reversal of 1215632867 is 7682365121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1215632867 - 2⁴ = 1215632851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215632861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607816433 + 607816434.

It is an arithmetic number, because the mean of its divisors is an integer number (607816434).

Almost surely, 2^1215632867 is an apocalyptic number.

1215632867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215632867 is an equidigital number, since it uses as much as digits as its factorization.

1215632867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 1215632867 is about 34865.9270205167. The cubic root of 1215632867 is about 1067.2532300029.

Adding to 1215632867 its reverse (7682365121), we get a palindrome (8897997988).

The spelling of 1215632867 in words is "one billion, two hundred fifteen million, six hundred thirty-two thousand, eight hundred sixty-seven".