1280859285 has 16 divisors (see below), whose sum is σ = 2064121920. Its totient is φ = 678209280.

The previous prime is 1280859277. The next prime is 1280859287. The reversal of 1280859285 is 5829580821.

It is not a de Polignac number, because 1280859285 - 2³ = 1280859277 is a prime.

It is a super-2 number, since 2×1280859285² = 3281201015941422450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280859287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305076 + ... + 309245.

It is an arithmetic number, because the mean of its divisors is an integer number (129007620).

Almost surely, 2^1280859285 is an apocalyptic number.

1280859285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1280859285 is a deficient number, since it is larger than the sum of its proper divisors (783262635).

1280859285 is a wasteful number, since it uses less digits than its factorization.

1280859285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614468.

The product of its (nonzero) digits is 460800, while the sum is 48.

The square root of 1280859285 is about 35789.0944981848. The cubic root of 1280859285 is about 1086.0099567002.

The spelling of 1280859285 in words is "one billion, two hundred eighty million, eight hundred fifty-nine thousand, two hundred eighty-five".