1280924 has 12 divisors (see below), whose sum is σ = 2255400. Its totient is φ = 636528.

The previous prime is 1280921. The next prime is 1280947. The reversal of 1280924 is 4290821.

It is a junction number, because it is equal to n+sod(n) for n = 1280893 and 1280902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (187950).

2^1280924 is an apocalyptic number.

It is an amenable number.

1280924 is a deficient number, since it is larger than the sum of its proper divisors (974476).

1280924 is a wasteful number, since it uses less digits than its factorization.

1280924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972 (or 1970 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1280924 is about 1131.7791303960. The cubic root of 1280924 is about 108.6028246492.

The spelling of 1280924 in words is "one million, two hundred eighty thousand, nine hundred twenty-four".