1280678 has 16 divisors (see below), whose sum is σ = 2325024. Its totient is φ = 516480.

The previous prime is 1280677. The next prime is 1280693. The reversal of 1280678 is 8760821.

It is a super-2 number, since 2×1280678² = 3280272279368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2453 + ... + 2928.

It is an arithmetic number, because the mean of its divisors is an integer number (145314).

2^1280678 is an apocalyptic number.

1280678 is a deficient number, since it is larger than the sum of its proper divisors (1044346).

1280678 is a wasteful number, since it uses less digits than its factorization.

1280678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1280678 is about 1131.6704467291. The cubic root of 1280678 is about 108.5958718544.

It can be divided in two parts, 12 and 80678, that multiplied together give a triangular number (968136 = T₁₃₉₁).

The spelling of 1280678 in words is "one million, two hundred eighty thousand, six hundred seventy-eight".