42440743 has 2 divisors, whose sum is σ = 42440744. Its totient is φ = 42440742.

The previous prime is 42440719. The next prime is 42440753. The reversal of 42440743 is 34704424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42440743 - 2¹⁷ = 42309671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220371 + 21220372.

It is an arithmetic number, because the mean of its divisors is an integer number (21220372).

Almost surely, 2^42440743 is an apocalyptic number.

42440743 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440743 is an equidigital number, since it uses as much as digits as its factorization.

42440743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 42440743 is about 6514.6560154777. The cubic root of 42440743 is about 348.8143362677.

The spelling of 42440743 in words is "forty-two million, four hundred forty thousand, seven hundred forty-three".