42860081 has 4 divisors (see below), whose sum is σ = 46756464. Its totient is φ = 38963700.

The previous prime is 42860071. The next prime is 42860113. The reversal of 42860081 is 18006824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42860081 is a prime.

It is a super-2 number, since 2×42860081² = 3673973086653122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42860021) 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, 1948175 + ... + 1948196.

It is an arithmetic number, because the mean of its divisors is an integer number (11689116).

Almost surely, 2^42860081 is an apocalyptic number.

It is an amenable number.

42860081 is a deficient number, since it is larger than the sum of its proper divisors (3896383).

42860081 is a wasteful number, since it uses less digits than its factorization.

42860081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896382.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 42860081 is about 6546.7611076012. The cubic root of 42860081 is about 349.9593993721.

The spelling of 42860081 in words is "forty-two million, eight hundred sixty thousand, eighty-one".