290401 has 4 divisors (see below), whose sum is σ = 292500. Its totient is φ = 288304.

The previous prime is 290399. The next prime is 290419. The reversal of 290401 is 104092.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129600 + 160801 = 360^2 + 401^2 .

It is a cyclic number.

It is not a de Polignac number, because 290401 - 2¹ = 290399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290441) 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, 826 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (73125).

2²⁹⁰⁴⁰¹ is an apocalyptic number.

It is an amenable number.

290401 is a deficient number, since it is larger than the sum of its proper divisors (2099).

290401 is a wasteful number, since it uses less digits than its factorization.

290401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 290401 is about 538.8886712485. Note that the first 3 decimals coincide. The cubic root of 290401 is about 66.2215541817.

Adding to 290401 its reverse (104092), we get a palindrome (394493).

The spelling of 290401 in words is "two hundred ninety thousand, four hundred one".