42125605 has 8 divisors (see below), whose sum is σ = 50606712. Its totient is φ = 33663168.

The previous prime is 42125597. The next prime is 42125639. The reversal of 42125605 is 50652124.

It can be written as a sum of positive squares in 4 ways, for example, as 3175524 + 38950081 = 1782^2 + 6241^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42125605 - 2³ = 42125597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42125605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907 + ... + 9223.

It is an arithmetic number, because the mean of its divisors is an integer number (6325839).

Almost surely, 2^42125605 is an apocalyptic number.

It is an amenable number.

42125605 is a deficient number, since it is larger than the sum of its proper divisors (8481107).

42125605 is a wasteful number, since it uses less digits than its factorization.

42125605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9335.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 42125605 is about 6490.4241001648. The cubic root of 42125605 is about 347.9488325925.

Adding to 42125605 its reverse (50652124), we get a palindrome (92777729).

The spelling of 42125605 in words is "forty-two million, one hundred twenty-five thousand, six hundred five".