42020131 has 2 divisors, whose sum is σ = 42020132. Its totient is φ = 42020130.

The previous prime is 42020093. The next prime is 42020171. The reversal of 42020131 is 13102024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42020131 - 2⁷ = 42020003 is a prime.

It is a super-2 number, since 2×42020131² = 3531382818514322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42020171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010065 + 21010066.

It is an arithmetic number, because the mean of its divisors is an integer number (21010066).

Almost surely, 2^42020131 is an apocalyptic number.

42020131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020131 is an equidigital number, since it uses as much as digits as its factorization.

42020131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 42020131 is about 6482.2936527127. The cubic root of 42020131 is about 347.6581920405.

Adding to 42020131 its reverse (13102024), we get a palindrome (55122155).

The spelling of 42020131 in words is "forty-two million, twenty thousand, one hundred thirty-one".