290145 has 24 divisors (see below), whose sum is σ = 501696. Its totient is φ = 142912.

The previous prime is 290141. The next prime is 290161. The reversal of 290145 is 541092.

It is not a de Polignac number, because 290145 - 2² = 290141 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

290145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (290141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9991 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (20904).

290145 is a Friedman number, since it can be written as 29*(10^4+5), using all its digits and the basic arithmetic operations.

2²⁹⁰¹⁴⁵ is an apocalyptic number.

It is an amenable number.

290145 is a deficient number, since it is larger than the sum of its proper divisors (211551).

290145 is a wasteful number, since it uses less digits than its factorization.

290145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 290145 is about 538.6510930092. The cubic root of 290145 is about 66.2020894854.

It can be divided in two parts, 290 and 145, that added together give a triangular number (435 = T₂₉).

The spelling of 290145 in words is "two hundred ninety thousand, one hundred forty-five".