42001005 has 16 divisors (see below), whose sum is σ = 67281984. Its totient is φ = 22373760.

The previous prime is 42000997. The next prime is 42001021. The reversal of 42001005 is 50010024.

It is not a de Polignac number, because 42001005 - 2³ = 42000997 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23545 + ... + 25265.

It is an arithmetic number, because the mean of its divisors is an integer number (4205124).

Almost surely, 2^42001005 is an apocalyptic number.

It is an amenable number.

42001005 is a deficient number, since it is larger than the sum of its proper divisors (25280979).

42001005 is a wasteful number, since it uses less digits than its factorization.

42001005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 42001005 is about 6480.8182353774. The cubic root of 42001005 is about 347.6054370116.

Adding to 42001005 its reverse (50010024), we get a palindrome (92011029).

The spelling of 42001005 in words is "forty-two million, one thousand, five".