1273013680 has 40 divisors (see below), whose sum is σ = 3115537200. Its totient is φ = 482404608.

The previous prime is 1273013657. The next prime is 1273013689. The reversal of 1273013680 is 863103721.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1273013689) 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, 417235 + ... + 420274.

It is an arithmetic number, because the mean of its divisors is an integer number (77888430).

Almost surely, 2^1273013680 is an apocalyptic number.

1273013680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273013680 is an abundant number, since it is smaller than the sum of its proper divisors (1842523520).

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

1273013680 is a wasteful number, since it uses less digits than its factorization.

1273013680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837541 (or 837535 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1273013680 is about 35679.3172580418. The cubic root of 1273013680 is about 1083.7880469573.

The spelling of 1273013680 in words is "one billion, two hundred seventy-three million, thirteen thousand, six hundred eighty".