42440641 has 2 divisors, whose sum is σ = 42440642. Its totient is φ = 42440640.

The previous prime is 42440633. The next prime is 42440669. The reversal of 42440641 is 14604424.

42440641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 450241 = 6480^2 + 671^2 .

It is a cyclic number.

It is not a de Polignac number, because 42440641 - 2³ = 42440633 is a prime.

It is a super-3 number, since 3×42440641³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42440611) 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 as a sum of consecutive naturals, namely, 21220320 + 21220321.

It is an arithmetic number, because the mean of its divisors is an integer number (21220321).

Almost surely, 2^42440641 is an apocalyptic number.

It is an amenable number.

42440641 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440641 is an equidigital number, since it uses as much as digits as its factorization.

42440641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 42440641 is about 6514.6481869707. The cubic root of 42440641 is about 348.8140568264.

The spelling of 42440641 in words is "forty-two million, four hundred forty thousand, six hundred forty-one".