42515172 has 48 divisors (see below), whose sum is σ = 125973120. Its totient is φ = 12146976.

The previous prime is 42515159. The next prime is 42515177. The reversal of 42515172 is 27151524.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42515177) 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, 27363 + ... + 28874.

It is an arithmetic number, because the mean of its divisors is an integer number (2624440).

Almost surely, 2^42515172 is an apocalyptic number.

42515172 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

42515172 is an abundant number, since it is smaller than the sum of its proper divisors (83457948).

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

42515172 is a wasteful number, since it uses less digits than its factorization.

42515172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56257 (or 56249 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 42515172 is about 6520.3659406509. The cubic root of 42515172 is about 349.0181242520.

Adding to 42515172 its reverse (27151524), we get a palindrome (69666696).

The spelling of 42515172 in words is "forty-two million, five hundred fifteen thousand, one hundred seventy-two".