42006657 has 32 divisors (see below), whose sum is σ = 71470080. Its totient is φ = 21309120.

The previous prime is 42006631. The next prime is 42006659. The reversal of 42006657 is 75660024.

It is not a de Polignac number, because 42006657 - 2²⁰ = 40958081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42006659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7819 + ... + 12047.

It is an arithmetic number, because the mean of its divisors is an integer number (2233440).

Almost surely, 2^42006657 is an apocalyptic number.

It is an amenable number.

42006657 is a deficient number, since it is larger than the sum of its proper divisors (29463423).

42006657 is a wasteful number, since it uses less digits than its factorization.

42006657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 42006657 is about 6481.2542767585. The cubic root of 42006657 is about 347.6210285259.

The spelling of 42006657 in words is "forty-two million, six thousand, six hundred fifty-seven".