1602609 has 4 divisors (see below), whose sum is σ = 2136816. Its totient is φ = 1068404.

The previous prime is 1602599. The next prime is 1602611. The reversal of 1602609 is 9062061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9062061 = 3 ⋅3020687.

It is a cyclic number.

It is not a de Polignac number, because 1602609 - 2⁸ = 1602353 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1602509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267099 + ... + 267104.

It is an arithmetic number, because the mean of its divisors is an integer number (534204).

2^1602609 is an apocalyptic number.

It is an amenable number.

1602609 is a deficient number, since it is larger than the sum of its proper divisors (534207).

1602609 is an equidigital number, since it uses as much as digits as its factorization.

1602609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534206.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1602609 is about 1265.9419417967. The cubic root of 1602609 is about 117.0242480242.

It can be divided in two parts, 1602 and 609, that added together give a triangular number (2211 = T₆₆).

The spelling of 1602609 in words is "one million, six hundred two thousand, six hundred nine".