1605364 has 6 divisors (see below), whose sum is σ = 2809394. Its totient is φ = 802680.

The previous prime is 1605349. The next prime is 1605389. The reversal of 1605364 is 4635061.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 116964 = 1220^2 + 342^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200667 + ... + 200674.

2^1605364 is an apocalyptic number.

It is an amenable number.

1605364 is a deficient number, since it is larger than the sum of its proper divisors (1204030).

1605364 is a wasteful number, since it uses less digits than its factorization.

1605364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401345 (or 401343 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1605364 is about 1267.0295971287. The cubic root of 1605364 is about 117.0912673316.

The spelling of 1605364 in words is "one million, six hundred five thousand, three hundred sixty-four".