121404 has 24 divisors (see below), whose sum is σ = 289408. Its totient is φ = 39600.

The previous prime is 121403. The next prime is 121421. The reversal of 121404 is 404121.

121404 is nontrivially palindromic in base 11.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 121404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121404.

It is not an unprimeable number, because it can be changed into a prime (121403) 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, 729 + ... + 879.

2¹²¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

121404 is an abundant number, since it is smaller than the sum of its proper divisors (168004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121404 is a wasteful number, since it uses less digits than its factorization.

121404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 121404 is about 348.4307678722. The cubic root of 121404 is about 49.5158606454.

Adding to 121404 its reverse (404121), we get a palindrome (525525).

It can be divided in two parts, 121 and 404, that multiplied together give a palindrome (48884).

The spelling of 121404 in words is "one hundred twenty-one thousand, four hundred four", and thus it is an iban number.