42281641 has 2 divisors, whose sum is σ = 42281642. Its totient is φ = 42281640.

The previous prime is 42281633. The next prime is 42281653. The reversal of 42281641 is 14618224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30206016 + 12075625 = 5496^2 + 3475^2 .

It is a cyclic number.

It is not a de Polignac number, because 42281641 - 2³ = 42281633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42281741) 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, 21140820 + 21140821.

It is an arithmetic number, because the mean of its divisors is an integer number (21140821).

Almost surely, 2^42281641 is an apocalyptic number.

42281641 is the 4113-rd centered pentagonal number.

It is an amenable number.

42281641 is a deficient number, since it is larger than the sum of its proper divisors (1).

42281641 is an equidigital number, since it uses as much as digits as its factorization.

42281641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 28.

The square root of 42281641 is about 6502.4334675566. The cubic root of 42281641 is about 348.3779116705.

Adding to 42281641 its reverse (14618224), we get a palindrome (56899865).

The spelling of 42281641 in words is "forty-two million, two hundred eighty-one thousand, six hundred forty-one".