1326605 has 16 divisors (see below), whose sum is σ = 1883520. Its totient is φ = 877632.

The previous prime is 1326587. The next prime is 1326607. The reversal of 1326605 is 5066231.

It is not a de Polignac number, because 1326605 - 2⁸ = 1326349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (117720).

2^1326605 is an apocalyptic number.

It is an amenable number.

1326605 is a deficient number, since it is larger than the sum of its proper divisors (556915).

1326605 is a wasteful number, since it uses less digits than its factorization.

1326605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1326605 is about 1151.7833997762. The cubic root of 1326605 is about 109.8787921111.

It can be divided in two parts, 132 and 6605, that multiplied together give a triangular number (871860 = T₁₃₂₀).

The spelling of 1326605 in words is "one million, three hundred twenty-six thousand, six hundred five".