42080581 has 4 divisors (see below), whose sum is σ = 43217932. Its totient is φ = 40943232.

The previous prime is 42080567. The next prime is 42080641. The reversal of 42080581 is 18508024.

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 19660356 + 22420225 = 4434^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 42080581 - 2⁷ = 42080453 is a prime.

It is a super-2 number, since 2×42080581² = 3541550594595122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42080551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568620 + ... + 568693.

It is an arithmetic number, because the mean of its divisors is an integer number (10804483).

Almost surely, 2^42080581 is an apocalyptic number.

It is an amenable number.

42080581 is a deficient number, since it is larger than the sum of its proper divisors (1137351).

42080581 is a wasteful number, since it uses less digits than its factorization.

42080581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137350.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 42080581 is about 6486.9546784296. The cubic root of 42080581 is about 347.8248254091.

The spelling of 42080581 in words is "forty-two million, eighty thousand, five hundred eighty-one".