42002931 has 4 divisors (see below), whose sum is σ = 56003912. Its totient is φ = 28001952.

The previous prime is 42002929. The next prime is 42002969. The reversal of 42002931 is 13920024.

42002931 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 not a de Polignac number, because 42002931 - 2¹ = 42002929 is a prime.

It is a super-2 number, since 2×42002931² = 3528492425181522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42002898 and 42002907.

It is not an unprimeable number, because it can be changed into a prime (42002921) 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, 7000486 + ... + 7000491.

It is an arithmetic number, because the mean of its divisors is an integer number (14000978).

Almost surely, 2^42002931 is an apocalyptic number.

42002931 is a deficient number, since it is larger than the sum of its proper divisors (14000981).

42002931 is a wasteful number, since it uses less digits than its factorization.

42002931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14000980.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 42002931 is about 6480.9668260222. The cubic root of 42002931 is about 347.6107502006.

Adding to 42002931 its reverse (13920024), we get a palindrome (55922955).

The spelling of 42002931 in words is "forty-two million, two thousand, nine hundred thirty-one".