120656603 has 4 divisors (see below), whose sum is σ = 121197888. Its totient is φ = 120115320.

The previous prime is 120656573. The next prime is 120656609. The reversal of 120656603 is 306656021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306656021 = 7 ⋅43808003.

It is a cyclic number.

It is not a de Polignac number, because 120656603 - 2¹² = 120652507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120656609) 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, 270308 + ... + 270753.

It is an arithmetic number, because the mean of its divisors is an integer number (30299472).

Almost surely, 2^120656603 is an apocalyptic number.

120656603 is a deficient number, since it is larger than the sum of its proper divisors (541285).

120656603 is an equidigital number, since it uses as much as digits as its factorization.

120656603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541284.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 120656603 is about 10984.3799551909. The cubic root of 120656603 is about 494.1404024854.

The spelling of 120656603 in words is "one hundred twenty million, six hundred fifty-six thousand, six hundred three".