1604266 has 4 divisors (see below), whose sum is σ = 2406402. Its totient is φ = 802132.

The previous prime is 1604263. The next prime is 1604279. The reversal of 1604266 is 6624061.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1575025 + 29241 = 1255^2 + 171^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1604266.

It is not an unprimeable number, because it can be changed into a prime (1604263) 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, 401065 + ... + 401068.

2^1604266 is an apocalyptic number.

1604266 is a deficient number, since it is larger than the sum of its proper divisors (802136).

1604266 is an equidigital number, since it uses as much as digits as its factorization.

1604266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802135.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1604266 is about 1266.5962261115. The cubic root of 1604266 is about 117.0645661112.

The spelling of 1604266 in words is "one million, six hundred four thousand, two hundred sixty-six".