1280624 has 10 divisors (see below), whose sum is σ = 2481240. Its totient is φ = 640304.

The previous prime is 1280623. The next prime is 1280633. The reversal of 1280624 is 4260821.

It is a self number, because there is not a number n which added to its sum of digits gives 1280624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40004 + ... + 40035.

It is an arithmetic number, because the mean of its divisors is an integer number (248124).

2^1280624 is an apocalyptic number.

It is an amenable number.

1280624 is a deficient number, since it is larger than the sum of its proper divisors (1200616).

1280624 is an equidigital number, since it uses as much as digits as its factorization.

1280624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80047 (or 80041 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1280624 is about 1131.6465879417. The cubic root of 1280624 is about 108.5943455120.

The spelling of 1280624 in words is "one million, two hundred eighty thousand, six hundred twenty-four".