1273385456 has 40 divisors (see below), whose sum is σ = 2821840224. Its totient is φ = 545310720.

The previous prime is 1273385417. The next prime is 1273385479. The reversal of 1273385456 is 6545833721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170276 + ... + 177596.

Almost surely, 2^1273385456 is an apocalyptic number.

1273385456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1273385456 is an abundant number, since it is smaller than the sum of its proper divisors (1548454768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1273385456 is a wasteful number, since it uses less digits than its factorization.

1273385456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8889 (or 8883 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The square root of 1273385456 is about 35684.5268428769. The cubic root of 1273385456 is about 1083.8935412851.

It can be divided in two parts, 12733 and 85456, that added together give a palindrome (98189).

The spelling of 1273385456 in words is "one billion, two hundred seventy-three million, three hundred eighty-five thousand, four hundred fifty-six".