1272233217 has 16 divisors (see below), whose sum is σ = 1827119360. Its totient is φ = 784827792.

The previous prime is 1272233191. The next prime is 1272233227. The reversal of 1272233217 is 7123322721.

It is not a de Polignac number, because 1272233217 - 2¹² = 1272229121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272233227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257083 + ... + 261984.

It is an arithmetic number, because the mean of its divisors is an integer number (114194960).

Almost surely, 2^1272233217 is an apocalyptic number.

It is an amenable number.

1272233217 is a deficient number, since it is larger than the sum of its proper divisors (554886143).

1272233217 is a wasteful number, since it uses less digits than its factorization.

1272233217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519132.

The product of its digits is 7056, while the sum is 30.

The square root of 1272233217 is about 35668.3783903894. The cubic root of 1272233217 is about 1083.5665176832.

Adding to 1272233217 its reverse (7123322721), we get a palindrome (8395555938).

The spelling of 1272233217 in words is "one billion, two hundred seventy-two million, two hundred thirty-three thousand, two hundred seventeen".