1280750485 has 24 divisors (see below), whose sum is σ = 1829415456. Its totient is φ = 857797920.

The previous prime is 1280750477. The next prime is 1280750491. The reversal of 1280750485 is 5840570821.

It is not a de Polignac number, because 1280750485 - 2³ = 1280750477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50251 + ... + 71320.

It is an arithmetic number, because the mean of its divisors is an integer number (76225644).

Almost surely, 2^1280750485 is an apocalyptic number.

It is an amenable number.

1280750485 is a deficient number, since it is larger than the sum of its proper divisors (548664971).

1280750485 is a wasteful number, since it uses less digits than its factorization.

1280750485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121633 (or 121626 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 1280750485 is about 35787.5744498003. The cubic root of 1280750485 is about 1085.9792061901.

The spelling of 1280750485 in words is "one billion, two hundred eighty million, seven hundred fifty thousand, four hundred eighty-five".