1273627872 has 72 divisors (see below), whose sum is σ = 3951150840. Its totient is φ = 385946880.

The previous prime is 1273627871. The next prime is 1273627897. The reversal of 1273627872 is 2787263721.

1273627872 is a `hidden beast` number, since 12 + 7 + 3 + 627 + 8 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273627871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197847 + ... + 204182.

It is an arithmetic number, because the mean of its divisors is an integer number (54877095).

Almost surely, 2^1273627872 is an apocalyptic number.

1273627872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1273627872 is an abundant number, since it is smaller than the sum of its proper divisors (2677522968).

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

1273627872 is a wasteful number, since it uses less digits than its factorization.

1273627872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402056 (or 402045 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 1273627872 is about 35687.9233354926. The cubic root of 1273627872 is about 1083.9623176491.

The spelling of 1273627872 in words is "one billion, two hundred seventy-three million, six hundred twenty-seven thousand, eight hundred seventy-two".