1272427045 has 8 divisors (see below), whose sum is σ = 1593300096. Its totient is φ = 973683216.

The previous prime is 1272427043. The next prime is 1272427081. The reversal of 1272427045 is 5407242721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1272427045 - 2¹ = 1272427043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272427045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272427043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5532177 + ... + 5532406.

It is an arithmetic number, because the mean of its divisors is an integer number (199162512).

Almost surely, 2^1272427045 is an apocalyptic number.

It is an amenable number.

1272427045 is a deficient number, since it is larger than the sum of its proper divisors (320873051).

1272427045 is a wasteful number, since it uses less digits than its factorization.

1272427045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064611.

The product of its (nonzero) digits is 31360, while the sum is 34.

The square root of 1272427045 is about 35671.0953714629. The cubic root of 1272427045 is about 1083.6215429367.

Adding to 1272427045 its reverse (5407242721), we get a palindrome (6679669766).

The spelling of 1272427045 in words is "one billion, two hundred seventy-two million, four hundred twenty-seven thousand, forty-five".