42054931 has 2 divisors, whose sum is σ = 42054932. Its totient is φ = 42054930.

The previous prime is 42054913. The next prime is 42054973. The reversal of 42054931 is 13945024.

Together with previous prime (42054913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42054931 - 2⁵ = 42054899 is a prime.

It is a super-2 number, since 2×42054931² = 3537234442829522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42054931.

It is not a weakly prime, because it can be changed into another prime (42054911) 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, 21027465 + 21027466.

It is an arithmetic number, because the mean of its divisors is an integer number (21027466).

Almost surely, 2^42054931 is an apocalyptic number.

42054931 is a deficient number, since it is larger than the sum of its proper divisors (1).

42054931 is an equidigital number, since it uses as much as digits as its factorization.

42054931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 42054931 is about 6484.9773322657. The cubic root of 42054931 is about 347.7541394387.

Adding to 42054931 its reverse (13945024), we get a palindrome (55999955).

The spelling of 42054931 in words is "forty-two million, fifty-four thousand, nine hundred thirty-one".