42919165 has 4 divisors (see below), whose sum is σ = 51503004. Its totient is φ = 34335328.

The previous prime is 42919141. The next prime is 42919181. The reversal of 42919165 is 56191924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6666724 + 36252441 = 2582^2 + 6021^2 .

It is a cyclic number.

It is not a de Polignac number, because 42919165 - 2⁹ = 42918653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4291912 + ... + 4291921.

It is an arithmetic number, because the mean of its divisors is an integer number (12875751).

Almost surely, 2^42919165 is an apocalyptic number.

It is an amenable number.

42919165 is a deficient number, since it is larger than the sum of its proper divisors (8583839).

42919165 is an equidigital number, since it uses as much as digits as its factorization.

42919165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8583838.

The product of its digits is 19440, while the sum is 37.

The square root of 42919165 is about 6551.2720138917. The cubic root of 42919165 is about 350.1201356301.

It can be divided in two parts, 4291 and 9165, that added together give a square (13456 = 116²).

The spelling of 42919165 in words is "forty-two million, nine hundred nineteen thousand, one hundred sixty-five".