290081 has 4 divisors (see below), whose sum is σ = 316464. Its totient is φ = 263700.

The previous prime is 290057. The next prime is 290083. The reversal of 290081 is 180092.

290081 = 31² + 32² + ... + 96².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 290081 - 2¹⁴ = 273697 is a prime.

It is a super-2 number, since 2×290081² = 168293973122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290081.

It is not an unprimeable number, because it can be changed into a prime (290083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13175 + ... + 13196.

It is an arithmetic number, because the mean of its divisors is an integer number (79116).

2²⁹⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

290081 is a deficient number, since it is larger than the sum of its proper divisors (26383).

290081 is a wasteful number, since it uses less digits than its factorization.

290081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26382.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 290081 is about 538.5916820746. The cubic root of 290081 is about 66.1972215225.

The spelling of 290081 in words is "two hundred ninety thousand, eighty-one".