1273317845 has 16 divisors (see below), whose sum is σ = 1558267632. Its totient is φ = 998499840.

The previous prime is 1273317817. The next prime is 1273317863. The reversal of 1273317845 is 5487133721.

It can be written as a sum of positive squares in 8 ways, for example, as 166358404 + 1106959441 = 12898^2 + 33271^2 .

It is not a de Polignac number, because 1273317845 - 2¹⁸ = 1273055701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 463175 + ... + 465915.

It is an arithmetic number, because the mean of its divisors is an integer number (97391727).

Almost surely, 2^1273317845 is an apocalyptic number.

It is an amenable number.

1273317845 is a deficient number, since it is larger than the sum of its proper divisors (284949787).

1273317845 is a wasteful number, since it uses less digits than its factorization.

1273317845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552.

The product of its digits is 141120, while the sum is 41.

The square root of 1273317845 is about 35683.5794869293. The cubic root of 1273317845 is about 1083.8743576663.

The spelling of 1273317845 in words is "one billion, two hundred seventy-three million, three hundred seventeen thousand, eight hundred forty-five".