290042 has 4 divisors (see below), whose sum is σ = 435066. Its totient is φ = 145020.

The previous prime is 290041. The next prime is 290047. The reversal of 290042 is 240092.

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., 279841 + 10201 = 529^2 + 101^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 290042.

It is not an unprimeable number, because it can be changed into a prime (290041) 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, 72509 + ... + 72512.

2²⁹⁰⁰⁴² is an apocalyptic number.

290042 is a deficient number, since it is larger than the sum of its proper divisors (145024).

290042 is a wasteful number, since it uses less digits than its factorization.

290042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145023.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 290042 is about 538.5554753226. Note that the first 3 decimals coincide. The cubic root of 290042 is about 66.1942547565.

The spelling of 290042 in words is "two hundred ninety thousand, forty-two".