165603242 has 12 divisors (see below), whose sum is σ = 288960930. Its totient is φ = 70972776.

The previous prime is 165603241. The next prime is 165603247. The reversal of 165603242 is 242306561.

It can be written as a sum of positive squares in only one way, i.e., 141110641 + 24492601 = 11879^2 + 4949^2 .

It is not an unprimeable number, because it can be changed into a prime (165603241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 844817 + ... + 845012.

Almost surely, 2^165603242 is an apocalyptic number.

165603242 is a deficient number, since it is larger than the sum of its proper divisors (123357688).

165603242 is a wasteful number, since it uses less digits than its factorization.

165603242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689845 (or 1689838 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 165603242 is about 12868.6923189577. The cubic root of 165603242 is about 549.1482596211.

The spelling of 165603242 in words is "one hundred sixty-five million, six hundred three thousand, two hundred forty-two".