1275673820 has 12 divisors (see below), whose sum is σ = 2678915064. Its totient is φ = 510269520.

The previous prime is 1275673811. The next prime is 1275673823. The reversal of 1275673820 is 283765721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275673823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31891826 + ... + 31891865.

It is an arithmetic number, because the mean of its divisors is an integer number (223242922).

Almost surely, 2^1275673820 is an apocalyptic number.

1275673820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275673820 is an abundant number, since it is smaller than the sum of its proper divisors (1403241244).

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

1275673820 is a wasteful number, since it uses less digits than its factorization.

1275673820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63783700 (or 63783698 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 1275673820 is about 35716.5762636902. The cubic root of 1275673820 is about 1084.5424306023.

The spelling of 1275673820 in words is "one billion, two hundred seventy-five million, six hundred seventy-three thousand, eight hundred twenty".