1605662 has 4 divisors (see below), whose sum is σ = 2408496. Its totient is φ = 802830.

The previous prime is 1605631. The next prime is 1605677. The reversal of 1605662 is 2665061.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401414 + ... + 401417.

It is an arithmetic number, because the mean of its divisors is an integer number (602124).

2^1605662 is an apocalyptic number.

1605662 is a deficient number, since it is larger than the sum of its proper divisors (802834).

1605662 is an equidigital number, since it uses as much as digits as its factorization.

1605662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802833.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1605662 is about 1267.1471895561. The cubic root of 1605662 is about 117.0985120102.

The spelling of 1605662 in words is "one million, six hundred five thousand, six hundred sixty-two".