120420403 has 4 divisors (see below), whose sum is σ = 123357528. Its totient is φ = 117483280.

The previous prime is 120420361. The next prime is 120420437. The reversal of 120420403 is 304024021.

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

It is a cyclic number.

It is not a de Polignac number, because 120420403 - 2²¹ = 118323251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120420463) 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, 1468501 + ... + 1468582.

It is an arithmetic number, because the mean of its divisors is an integer number (30839382).

Almost surely, 2^120420403 is an apocalyptic number.

120420403 is a deficient number, since it is larger than the sum of its proper divisors (2937125).

120420403 is an equidigital number, since it uses as much as digits as its factorization.

120420403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937124.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 120420403 is about 10973.6230571311. The cubic root of 120420403 is about 493.8177451670.

Adding to 120420403 its reverse (304024021), we get a palindrome (424444424).

The spelling of 120420403 in words is "one hundred twenty million, four hundred twenty thousand, four hundred three".