1280016 has 40 divisors (see below), whose sum is σ = 3675360. Its totient is φ = 426528.

The previous prime is 1279997. The next prime is 1280023. The reversal of 1280016 is 6100821.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1050 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (91884).

2^1280016 is an apocalyptic number.

1280016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1280016 is an abundant number, since it is smaller than the sum of its proper divisors (2395344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280016 is a wasteful number, since it uses less digits than its factorization.

1280016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980 (or 2968 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1280016 is about 1131.3779209442. The cubic root of 1280016 is about 108.5771570648.

Adding to 1280016 its reverse (6100821), we get a palindrome (7380837).

The spelling of 1280016 in words is "one million, two hundred eighty thousand, sixteen".