290121 has 16 divisors (see below), whose sum is σ = 428736. Its totient is φ = 173376.

The previous prime is 290119. The next prime is 290137. The reversal of 290121 is 121092.

290121 = T₉₄ + T₉₅ + ... + T₁₃₆.

It is a happy number.

It is not a de Polignac number, because 290121 - 2¹ = 290119 is a prime.

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

290121 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 290121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290121.

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 15 ways as a sum of consecutive naturals, for example, 1591 + ... + 1763.

It is an arithmetic number, because the mean of its divisors is an integer number (26796).

2²⁹⁰¹²¹ is an apocalyptic number.

It is an amenable number.

290121 is a deficient number, since it is larger than the sum of its proper divisors (138615).

290121 is a wasteful number, since it uses less digits than its factorization.

290121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 290121 is about 538.6288146767. The cubic root of 290121 is about 66.2002640832.

The spelling of 290121 in words is "two hundred ninety thousand, one hundred twenty-one".