1280606 has 4 divisors (see below), whose sum is σ = 1920912. Its totient is φ = 640302.

The previous prime is 1280603. The next prime is 1280623. The reversal of 1280606 is 6060821.

It is a semiprime because it is the product of two primes.

1280606 is a modest number, since divided by 606 gives 128 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280603) 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 as a sum of consecutive naturals, namely, 320150 + ... + 320153.

It is an arithmetic number, because the mean of its divisors is an integer number (480228).

2^1280606 is an apocalyptic number.

1280606 is a deficient number, since it is larger than the sum of its proper divisors (640306).

1280606 is an equidigital number, since it uses as much as digits as its factorization.

1280606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640305.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1280606 is about 1131.6386349007. The cubic root of 1280606 is about 108.5938367216.

The spelling of 1280606 in words is "one million, two hundred eighty thousand, six hundred six".