1280464 has 20 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 635360.

The previous prime is 1280453. The next prime is 1280473. The reversal of 1280464 is 4640821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2847 + ... + 3265.

It is an arithmetic number, because the mean of its divisors is an integer number (124992).

2^1280464 is an apocalyptic number.

It is an amenable number.

1280464 is a deficient number, since it is larger than the sum of its proper divisors (1219376).

1280464 is a wasteful number, since it uses less digits than its factorization.

1280464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1280464 is about 1131.5758922847. The cubic root of 1280464 is about 108.5898227640.

The spelling of 1280464 in words is "one million, two hundred eighty thousand, four hundred sixty-four".