1273505673 has 16 divisors (see below), whose sum is σ = 1895452416. Its totient is φ = 753871440.

The previous prime is 1273505669. The next prime is 1273505687. The reversal of 1273505673 is 3765053721.

It is not a de Polignac number, because 1273505673 - 2² = 1273505669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1273505663) 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, 447315 + ... + 450152.

It is an arithmetic number, because the mean of its divisors is an integer number (118465776).

Almost surely, 2^1273505673 is an apocalyptic number.

It is an amenable number.

1273505673 is a deficient number, since it is larger than the sum of its proper divisors (621946743).

1273505673 is a wasteful number, since it uses less digits than its factorization.

1273505673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897524.

The product of its (nonzero) digits is 132300, while the sum is 39.

The square root of 1273505673 is about 35686.2112446810. The cubic root of 1273505673 is about 1083.9276493992.

The spelling of 1273505673 in words is "one billion, two hundred seventy-three million, five hundred five thousand, six hundred seventy-three".