42003131 has 4 divisors (see below), whose sum is σ = 42979992. Its totient is φ = 41026272.

The previous prime is 42003127. The next prime is 42003139. The reversal of 42003131 is 13130024.

42003131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42003131 - 2² = 42003127 is a prime.

It is a super-2 number, since 2×42003131² = 3528526027606322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42003139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488366 + ... + 488451.

It is an arithmetic number, because the mean of its divisors is an integer number (10744998).

Almost surely, 2^42003131 is an apocalyptic number.

42003131 is a deficient number, since it is larger than the sum of its proper divisors (976861).

42003131 is an equidigital number, since it uses as much as digits as its factorization.

42003131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976860.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 42003131 is about 6480.9822558004. The cubic root of 42003131 is about 347.6113019244.

Adding to 42003131 its reverse (13130024), we get a palindrome (55133155).

The spelling of 42003131 in words is "forty-two million, three thousand, one hundred thirty-one".