120421 has 4 divisors (see below), whose sum is σ = 137632. Its totient is φ = 103212.

The previous prime is 120413. The next prime is 120427. The reversal of 120421 is 124021.

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 120421 - 2³ = 120413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120398 and 120407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120427) 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, 8595 + ... + 8608.

It is an arithmetic number, because the mean of its divisors is an integer number (34408).

2¹²⁰⁴²¹ is an apocalyptic number.

It is an amenable number.

120421 is a deficient number, since it is larger than the sum of its proper divisors (17211).

120421 is an equidigital number, since it uses as much as digits as its factorization.

120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17210.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 120421 is about 347.0172906355. The cubic root of 120421 is about 49.3818561221.

Adding to 120421 its reverse (124021), we get a palindrome (244442).

Subtracting 120421 from its reverse (124021), we obtain a square (3600 = 60²).

It can be divided in two parts, 1204 and 21, that added together give a triangular number (1225 = T₄₉).

The spelling of 120421 in words is "one hundred twenty thousand, four hundred twenty-one", and thus it is an iban number.