42709718 has 4 divisors (see below), whose sum is σ = 64064580. Its totient is φ = 21354858.

The previous prime is 42709717. The next prime is 42709747. The reversal of 42709718 is 81790724.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42709717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677428 + ... + 10677431.

It is an arithmetic number, because the mean of its divisors is an integer number (16016145).

Almost surely, 2^42709718 is an apocalyptic number.

42709718 is a deficient number, since it is larger than the sum of its proper divisors (21354862).

42709718 is a wasteful number, since it uses less digits than its factorization.

42709718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21354861.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 42709718 is about 6535.2672477872. The cubic root of 42709718 is about 349.5496738994.

The spelling of 42709718 in words is "forty-two million, seven hundred nine thousand, seven hundred eighteen".