42740705 has 8 divisors (see below), whose sum is σ = 58615872. Its totient is φ = 29307888.

The previous prime is 42740689. The next prime is 42740713. The reversal of 42740705 is 50704724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42740705 - 2⁴ = 42740689 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610547 + ... + 610616.

It is an arithmetic number, because the mean of its divisors is an integer number (7326984).

Almost surely, 2^42740705 is an apocalyptic number.

It is an amenable number.

42740705 is a deficient number, since it is larger than the sum of its proper divisors (15875167).

42740705 is a wasteful number, since it uses less digits than its factorization.

42740705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221175.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 42740705 is about 6537.6375702543. The cubic root of 42740705 is about 349.6341892260.

The spelling of 42740705 in words is "forty-two million, seven hundred forty thousand, seven hundred five".