42734539 has 2 divisors, whose sum is σ = 42734540. Its totient is φ = 42734538.

The previous prime is 42734537. The next prime is 42734557. The reversal of 42734539 is 93543724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42734539 - 2¹ = 42734537 is a prime.

Together with 42734537, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42734498 and 42734507.

It is not a weakly prime, because it can be changed into another prime (42734537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21367269 + 21367270.

It is an arithmetic number, because the mean of its divisors is an integer number (21367270).

Almost surely, 2^42734539 is an apocalyptic number.

42734539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42734539 is an equidigital number, since it uses as much as digits as its factorization.

42734539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 42734539 is about 6537.1659761704. The cubic root of 42734539 is about 349.6173750587.

The spelling of 42734539 in words is "forty-two million, seven hundred thirty-four thousand, five hundred thirty-nine".