42003739 has 2 divisors, whose sum is σ = 42003740. Its totient is φ = 42003738.

The previous prime is 42003697. The next prime is 42003751. The reversal of 42003739 is 93730024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42003739 - 2¹⁷ = 41872667 is a prime.

It is not a weakly prime, because it can be changed into another prime (42003799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21001869 + 21001870.

It is an arithmetic number, because the mean of its divisors is an integer number (21001870).

Almost surely, 2^42003739 is an apocalyptic number.

42003739 is a deficient number, since it is larger than the sum of its proper divisors (1).

42003739 is an equidigital number, since it uses as much as digits as its factorization.

42003739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 42003739 is about 6481.0291621007. The cubic root of 42003739 is about 347.6129791537.

The spelling of 42003739 in words is "forty-two million, three thousand, seven hundred thirty-nine".