1604206 has 4 divisors (see below), whose sum is σ = 2406312. Its totient is φ = 802102.

The previous prime is 1604191. The next prime is 1604231. The reversal of 1604206 is 6024061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6024061 = 1549 ⋅3889.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401050 + ... + 401053.

It is an arithmetic number, because the mean of its divisors is an integer number (601578).

2^1604206 is an apocalyptic number.

1604206 is a deficient number, since it is larger than the sum of its proper divisors (802106).

1604206 is an equidigital number, since it uses as much as digits as its factorization.

1604206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802105.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1604206 is about 1266.5725403624. The cubic root of 1604206 is about 117.0631066771.

Adding to 1604206 its reverse (6024061), we get a palindrome (7628267).

The spelling of 1604206 in words is "one million, six hundred four thousand, two hundred six".