42545172 has 24 divisors (see below), whose sum is σ = 99542016. Its totient is φ = 14143168.

The previous prime is 42545171. The next prime is 42545179. The reversal of 42545172 is 27154524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42545171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33 + ... + 9224.

It is an arithmetic number, because the mean of its divisors is an integer number (4147584).

Almost surely, 2^42545172 is an apocalyptic number.

It is an amenable number.

42545172 is an abundant number, since it is smaller than the sum of its proper divisors (56996844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42545172 is a wasteful number, since it uses less digits than its factorization.

42545172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9647 (or 9645 counting only the distinct ones).

The product of its digits is 11200, while the sum is 30.

The square root of 42545172 is about 6522.6660193513. Note that the first 3 decimals coincide. The cubic root of 42545172 is about 349.1001975561.

Adding to 42545172 its reverse (27154524), we get a palindrome (69699696).

The spelling of 42545172 in words is "forty-two million, five hundred forty-five thousand, one hundred seventy-two".