1280564 has 6 divisors (see below), whose sum is σ = 2240994. Its totient is φ = 640280.

The previous prime is 1280561. The next prime is 1280567. The reversal of 1280564 is 4650821.

It is an interprime number because it is at equal distance from previous prime (1280561) and next prime (1280567).

It can be written as a sum of positive squares in only one way, i.e., 1227664 + 52900 = 1108^2 + 230^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160067 + ... + 160074.

It is an arithmetic number, because the mean of its divisors is an integer number (373499).

2^1280564 is an apocalyptic number.

It is an amenable number.

1280564 is a deficient number, since it is larger than the sum of its proper divisors (960430).

1280564 is a wasteful number, since it uses less digits than its factorization.

1280564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320145 (or 320143 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1280564 is about 1131.6200775879. The cubic root of 1280564 is about 108.5926495256.

The spelling of 1280564 in words is "one million, two hundred eighty thousand, five hundred sixty-four".