42040061 has 16 divisors (see below), whose sum is σ = 49963008. Its totient is φ = 34614000.

The previous prime is 42040051. The next prime is 42040069. The reversal of 42040061 is 16004024.

It is a cyclic number.

It is not a de Polignac number, because 42040061 - 2¹⁰ = 42039037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040069) 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, 32126 + ... + 33408.

It is an arithmetic number, because the mean of its divisors is an integer number (3122688).

Almost surely, 2^42040061 is an apocalyptic number.

It is an amenable number.

42040061 is a deficient number, since it is larger than the sum of its proper divisors (7922947).

42040061 is a wasteful number, since it uses less digits than its factorization.

42040061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 42040061 is about 6483.8307349899. The cubic root of 42040061 is about 347.7131477046.

Adding to 42040061 its reverse (16004024), we get a palindrome (58044085).

The spelling of 42040061 in words is "forty-two million, forty thousand, sixty-one".