1272804166 has 24 divisors (see below), whose sum is σ = 1943766720. Its totient is φ = 625064976.

The previous prime is 1272804163. The next prime is 1272804173. The reversal of 1272804166 is 6614082721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272804163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4731480 + ... + 4731748.

It is an arithmetic number, because the mean of its divisors is an integer number (80990280).

Almost surely, 2^1272804166 is an apocalyptic number.

1272804166 is a deficient number, since it is larger than the sum of its proper divisors (670962554).

1272804166 is a wasteful number, since it uses less digits than its factorization.

1272804166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1272804166 is about 35676.3810664703. The cubic root of 1272804166 is about 1083.7285866832.

Adding to 1272804166 its reverse (6614082721), we get a palindrome (7886886887).

The spelling of 1272804166 in words is "one billion, two hundred seventy-two million, eight hundred four thousand, one hundred sixty-six".