42706657 has 8 divisors (see below), whose sum is σ = 48916736. Its totient is φ = 36523872.

The previous prime is 42706639. The next prime is 42706663. The reversal of 42706657 is 75660724.

42706657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-42706657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42706637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3348 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (6114592).

Almost surely, 2^42706657 is an apocalyptic number.

It is an amenable number.

42706657 is a deficient number, since it is larger than the sum of its proper divisors (6210079).

42706657 is a wasteful number, since it uses less digits than its factorization.

42706657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13647.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 42706657 is about 6535.0330527091. The cubic root of 42706657 is about 349.5413229732.

The spelling of 42706657 in words is "forty-two million, seven hundred six thousand, six hundred fifty-seven".