42665743 has 2 divisors, whose sum is σ = 42665744. Its totient is φ = 42665742.

The previous prime is 42665723. The next prime is 42665747. The reversal of 42665743 is 34756624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42665743 is a prime.

It is a super-3 number, since 3×42665743³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42665747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21332871 + 21332872.

It is an arithmetic number, because the mean of its divisors is an integer number (21332872).

Almost surely, 2^42665743 is an apocalyptic number.

42665743 is a deficient number, since it is larger than the sum of its proper divisors (1).

42665743 is an equidigital number, since it uses as much as digits as its factorization.

42665743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The square root of 42665743 is about 6531.9019435383. The cubic root of 42665743 is about 349.4296643227.

The spelling of 42665743 in words is "forty-two million, six hundred sixty-five thousand, seven hundred forty-three".