861151267 has 2 divisors, whose sum is σ = 861151268. Its totient is φ = 861151266.

The previous prime is 861151243. The next prime is 861151297. The reversal of 861151267 is 762151168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861151267 - 2¹⁵ = 861118499 is a prime.

It is not a weakly prime, because it can be changed into another prime (861151217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430575633 + 430575634.

It is an arithmetic number, because the mean of its divisors is an integer number (430575634).

Almost surely, 2^861151267 is an apocalyptic number.

861151267 is a deficient number, since it is larger than the sum of its proper divisors (1).

861151267 is an equidigital number, since it uses as much as digits as its factorization.

861151267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 861151267 is about 29345.3789718245. The cubic root of 861151267 is about 951.3927004238.

Subtracting from 861151267 its reverse (762151168), we obtain a palindrome (99000099).

The spelling of 861151267 in words is "eight hundred sixty-one million, one hundred fifty-one thousand, two hundred sixty-seven".