1280829 has 16 divisors (see below), whose sum is σ = 1915200. Its totient is φ = 754560.

The previous prime is 1280821. The next prime is 1280833. The reversal of 1280829 is 9280821.

1280829 = T₅₂₉ + T₅₃₀ + ... + T₅₃₇.

It is not a de Polignac number, because 1280829 - 2³ = 1280821 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1280796 and 1280805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280821) 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, 697 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

2^1280829 is an apocalyptic number.

It is an amenable number.

1280829 is a deficient number, since it is larger than the sum of its proper divisors (634371).

1280829 is a wasteful number, since it uses less digits than its factorization.

1280829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1280829 is about 1131.7371602983. The cubic root of 1280829 is about 108.6001397324.

The spelling of 1280829 in words is "one million, two hundred eighty thousand, eight hundred twenty-nine".