120403506 has 8 divisors (see below), whose sum is σ = 240807024. Its totient is φ = 40134500.

The previous prime is 120403501. The next prime is 120403523. The reversal of 120403506 is 605304021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

120403506 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120403501) 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, 10033620 + ... + 10033631.

It is an arithmetic number, because the mean of its divisors is an integer number (30100878).

Almost surely, 2^120403506 is an apocalyptic number.

120403506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120403506 is a wasteful number, since it uses less digits than its factorization.

120403506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20067256.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 120403506 is about 10972.8531385415. The cubic root of 120403506 is about 493.7946471190.

Adding to 120403506 its reverse (605304021), we get a palindrome (725707527).

The spelling of 120403506 in words is "one hundred twenty million, four hundred three thousand, five hundred six".