1273621938 has 16 divisors (see below), whose sum is σ = 2547840096. Its totient is φ = 424441280.

The previous prime is 1273621897. The next prime is 1273621939. The reversal of 1273621938 is 8391263721.

It is a super-2 number, since 2×1273621938² = 3244225681909751688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1273621938.

It is not an unprimeable number, because it can be changed into a prime (1273621939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5845 + ... + 50807.

It is an arithmetic number, because the mean of its divisors is an integer number (159240006).

Almost surely, 2^1273621938 is an apocalyptic number.

1273621938 is an abundant number, since it is smaller than the sum of its proper divisors (1274218158).

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

1273621938 is a wasteful number, since it uses less digits than its factorization.

1273621938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49689.

The product of its digits is 108864, while the sum is 42.

The square root of 1273621938 is about 35687.8401980282. The cubic root of 1273621938 is about 1083.9606342054.

The spelling of 1273621938 in words is "one billion, two hundred seventy-three million, six hundred twenty-one thousand, nine hundred thirty-eight".