1226420267 has 4 divisors (see below), whose sum is σ = 1240200360. Its totient is φ = 1212640176.

The previous prime is 1226420231. The next prime is 1226420287. The reversal of 1226420267 is 7620246221.

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 1226420267 - 2⁸ = 1226420011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226420287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6889913 + ... + 6890090.

It is an arithmetic number, because the mean of its divisors is an integer number (310050090).

Almost surely, 2^1226420267 is an apocalyptic number.

1226420267 is a deficient number, since it is larger than the sum of its proper divisors (13780093).

1226420267 is an equidigital number, since it uses as much as digits as its factorization.

1226420267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13780092.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 1226420267 is about 35020.2836510500. The cubic root of 1226420267 is about 1070.4008359352.

Adding to 1226420267 its reverse (7620246221), we get a palindrome (8846666488).

The spelling of 1226420267 in words is "one billion, two hundred twenty-six million, four hundred twenty thousand, two hundred sixty-seven".