1280744425 has 12 divisors (see below), whose sum is σ = 1600250256. Its totient is φ = 1016771600.

The previous prime is 1280744411. The next prime is 1280744449. The reversal of 1280744425 is 5244470821.

It is not a de Polignac number, because 1280744425 - 2⁹ = 1280743913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192259 + ... + 198808.

It is an arithmetic number, because the mean of its divisors is an integer number (133354188).

Almost surely, 2^1280744425 is an apocalyptic number.

It is an amenable number.

1280744425 is a deficient number, since it is larger than the sum of its proper divisors (319505831).

1280744425 is a wasteful number, since it uses less digits than its factorization.

1280744425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391208 (or 391203 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 37.

The square root of 1280744425 is about 35787.4897834425. The cubic root of 1280744425 is about 1085.9774933807.

The spelling of 1280744425 in words is "one billion, two hundred eighty million, seven hundred forty-four thousand, four hundred twenty-five".