42872145 has 16 divisors (see below), whose sum is σ = 68694720. Its totient is φ = 22832064.

The previous prime is 42872117. The next prime is 42872149. The reversal of 42872145 is 54127824.

It is not a de Polignac number, because 42872145 - 2⁷ = 42872017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42872149) 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, 11526 + ... + 14784.

It is an arithmetic number, because the mean of its divisors is an integer number (4293420).

Almost surely, 2^42872145 is an apocalyptic number.

It is an amenable number.

42872145 is a deficient number, since it is larger than the sum of its proper divisors (25822575).

42872145 is a wasteful number, since it uses less digits than its factorization.

42872145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144.

The product of its digits is 17920, while the sum is 33.

The square root of 42872145 is about 6547.6824144120. The cubic root of 42872145 is about 349.9922311201.

Adding to 42872145 its reverse (54127824), we get a palindrome (96999969).

The spelling of 42872145 in words is "forty-two million, eight hundred seventy-two thousand, one hundred forty-five".