120000421 has 4 divisors (see below), whose sum is σ = 120208972. Its totient is φ = 119791872.

The previous prime is 120000403. The next prime is 120000449. The reversal of 120000421 is 124000021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107848225 + 12152196 = 10385^2 + 3486^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000421 - 2¹⁷ = 119869349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120000398 and 120000407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000121) 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, 103410 + ... + 104563.

It is an arithmetic number, because the mean of its divisors is an integer number (30052243).

Almost surely, 2^120000421 is an apocalyptic number.

It is an amenable number.

120000421 is a deficient number, since it is larger than the sum of its proper divisors (208551).

120000421 is an equidigital number, since it uses as much as digits as its factorization.

120000421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208550.

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

The square root of 120000421 is about 10954.4703660195. The cubic root of 120000421 is about 493.2429916850.

Adding to 120000421 its reverse (124000021), we get a palindrome (244000442).

The spelling of 120000421 in words is "one hundred twenty million, four hundred twenty-one", and thus it is an aban number.