1280547085 has 16 divisors (see below), whose sum is σ = 1626024960. Its totient is φ = 965424960.

The previous prime is 1280547019. The next prime is 1280547109. The reversal of 1280547085 is 5807450821.

It is not a de Polignac number, because 1280547085 - 2¹¹ = 1280545037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17142 + ... + 53431.

It is an arithmetic number, because the mean of its divisors is an integer number (101626560).

Almost surely, 2^1280547085 is an apocalyptic number.

It is an amenable number.

1280547085 is a deficient number, since it is larger than the sum of its proper divisors (345477875).

1280547085 is a wasteful number, since it uses less digits than its factorization.

1280547085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70788.

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

The square root of 1280547085 is about 35784.7325685131. The cubic root of 1280547085 is about 1085.9217138923.

The spelling of 1280547085 in words is "one billion, two hundred eighty million, five hundred forty-seven thousand, eighty-five".