121504 has 12 divisors (see below), whose sum is σ = 239274. Its totient is φ = 60736.

The previous prime is 121501. The next prime is 121507. The reversal of 121504 is 405121.

It is an interprime number because it is at equal distance from previous prime (121501) and next prime (121507).

It can be written as a sum of positive squares in only one way, i.e., 121104 + 400 = 348^2 + 20^2 .

It is not an unprimeable number, because it can be changed into a prime (121501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1867 + ... + 1930.

2¹²¹⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

121504 is a deficient number, since it is larger than the sum of its proper divisors (117770).

121504 is an equidigital number, since it uses as much as digits as its factorization.

121504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807 (or 3799 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 121504 is about 348.5742388645. The cubic root of 121504 is about 49.5294522546.

Adding to 121504 its reverse (405121), we get a palindrome (526625).

It can be divided in two parts, 121 and 504, that added together give a 4-th power (625 = 5⁴).

The spelling of 121504 in words is "one hundred twenty-one thousand, five hundred four".