42025831 has 2 divisors, whose sum is σ = 42025832. Its totient is φ = 42025830.

The previous prime is 42025793. The next prime is 42025871. The reversal of 42025831 is 13852024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42025831 - 2⁷ = 42025703 is a prime.

It is a super-2 number, since 2×42025831² = 3532340942481122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42025796 and 42025805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42025871) by changing a digit.

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 as a sum of consecutive naturals, namely, 21012915 + 21012916.

It is an arithmetic number, because the mean of its divisors is an integer number (21012916).

Almost surely, 2^42025831 is an apocalyptic number.

42025831 is a deficient number, since it is larger than the sum of its proper divisors (1).

42025831 is an equidigital number, since it uses as much as digits as its factorization.

42025831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 42025831 is about 6482.7332969975. The cubic root of 42025831 is about 347.6739111895.

Adding to 42025831 its reverse (13852024), we get a palindrome (55877855).

The spelling of 42025831 in words is "forty-two million, twenty-five thousand, eight hundred thirty-one".