1605242 has 16 divisors (see below), whose sum is σ = 2633472. Its totient is φ = 730560.

The previous prime is 1605217. The next prime is 1605257. The reversal of 1605242 is 2425061.

It is a happy 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 in 7 ways as a sum of consecutive naturals, for example, 293 + ... + 1815.

It is an arithmetic number, because the mean of its divisors is an integer number (164592).

2^1605242 is an apocalyptic number.

1605242 is a deficient number, since it is larger than the sum of its proper divisors (1028230).

1605242 is a wasteful number, since it uses less digits than its factorization.

1605242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1605242 is about 1266.9814521136. The cubic root of 1605242 is about 117.0883011307.

The spelling of 1605242 in words is "one million, six hundred five thousand, two hundred forty-two".