42561603 has 12 divisors (see below), whose sum is σ = 70260528. Its totient is φ = 24320880.

The previous prime is 42561599. The next prime is 42561611. The reversal of 42561603 is 30616524.

42561603 is a `hidden beast` number, since 4 + 2 + 56 + 1 + 603 = 666.

It is not a de Polignac number, because 42561603 - 2² = 42561599 is a prime.

It is a super-2 number, since 2×42561603² = 3622980099859218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42561613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337728 + ... + 337853.

It is an arithmetic number, because the mean of its divisors is an integer number (5855044).

Almost surely, 2^42561603 is an apocalyptic number.

42561603 is a deficient number, since it is larger than the sum of its proper divisors (27698925).

42561603 is a wasteful number, since it uses less digits than its factorization.

42561603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675594 (or 675591 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 42561603 is about 6523.9254287584. The cubic root of 42561603 is about 349.1451327533.

The spelling of 42561603 in words is "forty-two million, five hundred sixty-one thousand, six hundred three".