1273730020 has 24 divisors (see below), whose sum is σ = 2718685368. Its totient is φ = 501139200.

The previous prime is 1273730009. The next prime is 1273730021. The reversal of 1273730020 is 200373721.

It can be written as a sum of positive squares in 4 ways, for example, as 169364196 + 1104365824 = 13014^2 + 33232^2 .

It is not an unprimeable number, because it can be changed into a prime (1273730021) 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, 520801 + ... + 523240.

It is an arithmetic number, because the mean of its divisors is an integer number (113278557).

Almost surely, 2^1273730020 is an apocalyptic number.

1273730020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273730020 is an abundant number, since it is smaller than the sum of its proper divisors (1444955348).

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

1273730020 is a wasteful number, since it uses less digits than its factorization.

1273730020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044111 (or 1044109 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 1273730020 is about 35689.3544351814. The cubic root of 1273730020 is about 1083.9912956641.

The spelling of 1273730020 in words is "one billion, two hundred seventy-three million, seven hundred thirty thousand, twenty".