42723165 has 16 divisors (see below), whose sum is σ = 69064128. Its totient is φ = 22550016.

The previous prime is 42723157. The next prime is 42723169. The reversal of 42723165 is 56132724.

It is not a de Polignac number, because 42723165 - 2³ = 42723157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42723169) 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, 13227 + ... + 16136.

It is an arithmetic number, because the mean of its divisors is an integer number (4316508).

Almost surely, 2^42723165 is an apocalyptic number.

It is an amenable number.

42723165 is a deficient number, since it is larger than the sum of its proper divisors (26340963).

42723165 is a wasteful number, since it uses less digits than its factorization.

42723165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29468.

The product of its digits is 10080, while the sum is 30.

The square root of 42723165 is about 6536.2959694310. The cubic root of 42723165 is about 349.5863548663.

Adding to 42723165 its reverse (56132724), we get a palindrome (98855889).

The spelling of 42723165 in words is "forty-two million, seven hundred twenty-three thousand, one hundred sixty-five".