42315125 has 16 divisors (see below), whose sum is σ = 55918512. Its totient is φ = 31859200.

The previous prime is 42315113. The next prime is 42315127. The reversal of 42315125 is 52151324.

It can be written as a sum of positive squares in 8 ways, for example, as 20729809 + 21585316 = 4553^2 + 4646^2 .

It is not a de Polignac number, because 42315125 - 2⁸ = 42314869 is a prime.

It is a super-5 number, since 5×42315125⁵ (a number of 39 digits) contains 55555 as substring.

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 42315125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42315127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7832 + ... + 12081.

It is an arithmetic number, because the mean of its divisors is an integer number (3494907).

Almost surely, 2^42315125 is an apocalyptic number.

It is an amenable number.

42315125 is a deficient number, since it is larger than the sum of its proper divisors (13603387).

42315125 is a wasteful number, since it uses less digits than its factorization.

42315125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19945 (or 19935 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 42315125 is about 6505.0076863905. The cubic root of 42315125 is about 348.4698507704.

Adding to 42315125 its reverse (52151324), we get a palindrome (94466449).

The spelling of 42315125 in words is "forty-two million, three hundred fifteen thousand, one hundred twenty-five".