121449 has 4 divisors (see below), whose sum is σ = 161936. Its totient is φ = 80964.

The previous prime is 121447. The next prime is 121453. The reversal of 121449 is 944121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 944121 = 3 ⋅314707.

It is not a de Polignac number, because 121449 - 2¹ = 121447 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121441) 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, 20239 + ... + 20244.

It is an arithmetic number, because the mean of its divisors is an integer number (40484).

2¹²¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

121449 is a deficient number, since it is larger than the sum of its proper divisors (40487).

121449 is an equidigital number, since it uses as much as digits as its factorization.

121449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40486.

The product of its digits is 288, while the sum is 21.

The square root of 121449 is about 348.4953371281. The cubic root of 121449 is about 49.5219777928.

The spelling of 121449 in words is "one hundred twenty-one thousand, four hundred forty-nine".