42142065 has 32 divisors (see below), whose sum is σ = 81596160. Its totient is φ = 18130944.

The previous prime is 42142027. The next prime is 42142069. The reversal of 42142065 is 56024124.

It is not a de Polignac number, because 42142065 - 2⁷ = 42141937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42142069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10020 + ... + 13589.

It is an arithmetic number, because the mean of its divisors is an integer number (2549880).

Almost surely, 2^42142065 is an apocalyptic number.

It is an amenable number.

42142065 is a deficient number, since it is larger than the sum of its proper divisors (39454095).

42142065 is a wasteful number, since it uses less digits than its factorization.

42142065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23641.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 42142065 is about 6491.6919982390. The cubic root of 42142065 is about 347.9941454293.

Adding to 42142065 its reverse (56024124), we get a palindrome (98166189).

It can be divided in two parts, 421 and 42065, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 42142065 in words is "forty-two million, one hundred forty-two thousand, sixty-five".