121489 has 4 divisors (see below), whose sum is σ = 125440. Its totient is φ = 117540.

The previous prime is 121487. The next prime is 121493. The reversal of 121489 is 984121.

It is a happy number.

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 121489 - 2¹ = 121487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121487) 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, 1929 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (31360).

2¹²¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

121489 is a deficient number, since it is larger than the sum of its proper divisors (3951).

121489 is an equidigital number, since it uses as much as digits as its factorization.

121489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950.

The product of its digits is 576, while the sum is 25.

The square root of 121489 is about 348.5527219805. The cubic root of 121489 is about 49.5274139887.

The spelling of 121489 in words is "one hundred twenty-one thousand, four hundred eighty-nine".