1267222159 has 4 divisors (see below), whose sum is σ = 1448253904. Its totient is φ = 1086190416.

The previous prime is 1267222153. The next prime is 1267222163. The reversal of 1267222159 is 9512227621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1267222159 - 2¹³ = 1267213967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267222153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90515862 + ... + 90515875.

It is an arithmetic number, because the mean of its divisors is an integer number (362063476).

Almost surely, 2^1267222159 is an apocalyptic number.

1267222159 is a deficient number, since it is larger than the sum of its proper divisors (181031745).

1267222159 is an equidigital number, since it uses as much as digits as its factorization.

1267222159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181031744.

The product of its digits is 30240, while the sum is 37.

The square root of 1267222159 is about 35598.0639782559. The cubic root of 1267222159 is about 1082.1419991804.

It can be divided in two parts, 126722 and 2159, that added together give a square (128881 = 359²).

The spelling of 1267222159 in words is "one billion, two hundred sixty-seven million, two hundred twenty-two thousand, one hundred fifty-nine".