890121 has 8 divisors (see below), whose sum is σ = 1192320. Its totient is φ = 590672.

The previous prime is 890119. The next prime is 890129. The reversal of 890121 is 121098.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 890121 - 2¹ = 890119 is a prime.

It is an Ulam number.

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

It is not an unprimeable number, because it can be changed into a prime (890129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 1358.

It is an arithmetic number, because the mean of its divisors is an integer number (149040).

2⁸⁹⁰¹²¹ is an apocalyptic number.

It is an amenable number.

890121 is a deficient number, since it is larger than the sum of its proper divisors (302199).

890121 is a wasteful number, since it uses less digits than its factorization.

890121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 890121 is about 943.4622408979. The cubic root of 890121 is about 96.1943761363.

The spelling of 890121 in words is "eight hundred ninety thousand, one hundred twenty-one".