42039743 has 2 divisors, whose sum is σ = 42039744. Its totient is φ = 42039742.

The previous prime is 42039727. The next prime is 42039757. The reversal of 42039743 is 34793024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42039743 - 2⁴ = 42039727 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42039043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21019871 + 21019872.

It is an arithmetic number, because the mean of its divisors is an integer number (21019872).

Almost surely, 2^42039743 is an apocalyptic number.

42039743 is a deficient number, since it is larger than the sum of its proper divisors (1).

42039743 is an equidigital number, since it uses as much as digits as its factorization.

42039743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 42039743 is about 6483.8062124033. The cubic root of 42039743 is about 347.7122709769.

The spelling of 42039743 in words is "forty-two million, thirty-nine thousand, seven hundred forty-three".