42120603 has 12 divisors (see below), whose sum is σ = 69532528. Its totient is φ = 24068880.

The previous prime is 42120593. The next prime is 42120623. The reversal of 42120603 is 30602124.

It is a happy number.

42120603 is a `hidden beast` number, since 42 + 1 + 20 + 603 = 666.

42120603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42120603 - 2²⁰ = 41072027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42120623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334228 + ... + 334353.

Almost surely, 2^42120603 is an apocalyptic number.

42120603 is a deficient number, since it is larger than the sum of its proper divisors (27411925).

42120603 is a wasteful number, since it uses less digits than its factorization.

42120603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668594 (or 668591 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 42120603 is about 6490.0387518103. The cubic root of 42120603 is about 347.9350602170.

Adding to 42120603 its reverse (30602124), we get a palindrome (72722727).

The spelling of 42120603 in words is "forty-two million, one hundred twenty thousand, six hundred three".