121424 has 10 divisors (see below), whose sum is σ = 235290. Its totient is φ = 60704.

The previous prime is 121421. The next prime is 121439. The reversal of 121424 is 424121.

It can be written as a sum of positive squares in only one way, i.e., 67600 + 53824 = 260^2 + 232^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 121399 and 121408.

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 121424.

It is not an unprimeable number, because it can be changed into a prime (121421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3779 + ... + 3810.

It is an arithmetic number, because the mean of its divisors is an integer number (23529).

2¹²¹⁴²⁴ is an apocalyptic number.

It is an amenable number.

121424 is a deficient number, since it is larger than the sum of its proper divisors (113866).

121424 is an equidigital number, since it uses as much as digits as its factorization.

121424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7597 (or 7591 counting only the distinct ones).

The product of its digits is 64, while the sum is 14.

The square root of 121424 is about 348.4594667964. The cubic root of 121424 is about 49.5185795642.

Adding to 121424 its reverse (424121), we get a palindrome (545545).

It can be divided in two parts, 121 and 424, that added together give a palindrome (545).

The spelling of 121424 in words is "one hundred twenty-one thousand, four hundred twenty-four", and thus it is an iban number.