1273263397 has 8 divisors (see below), whose sum is σ = 1531745600. Its totient is φ = 1033928064.

The previous prime is 1273263391. The next prime is 1273263421. The reversal of 1273263397 is 7933623721.

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 1273263397 - 2³ = 1273263389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273263391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4786572 + ... + 4786837.

It is an arithmetic number, because the mean of its divisors is an integer number (191468200).

Almost surely, 2^1273263397 is an apocalyptic number.

It is an amenable number.

1273263397 is a deficient number, since it is larger than the sum of its proper divisors (258482203).

1273263397 is an equidigital number, since it uses as much as digits as its factorization.

1273263397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9573435.

The product of its digits is 285768, while the sum is 43.

The square root of 1273263397 is about 35682.8165508274. The cubic root of 1273263397 is about 1083.8589083600.

The spelling of 1273263397 in words is "one billion, two hundred seventy-three million, two hundred sixty-three thousand, three hundred ninety-seven".