1280425772 has 12 divisors (see below), whose sum is σ = 2261687400. Its totient is φ = 634229376.

The previous prime is 1280425763. The next prime is 1280425793. The reversal of 1280425772 is 2775240821.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495397 + ... + 1496252.

It is an arithmetic number, because the mean of its divisors is an integer number (188473950).

Almost surely, 2^1280425772 is an apocalyptic number.

It is an amenable number.

1280425772 is a deficient number, since it is larger than the sum of its proper divisors (981261628).

1280425772 is a wasteful number, since it uses less digits than its factorization.

1280425772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991760 (or 2991758 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 1280425772 is about 35783.0374898499. The cubic root of 1280425772 is about 1085.8874211064.

The spelling of 1280425772 in words is "one billion, two hundred eighty million, four hundred twenty-five thousand, seven hundred seventy-two".