42646505 has 32 divisors (see below), whose sum is σ = 57811968. Its totient is φ = 29937600.

The previous prime is 42646493. The next prime is 42646511. The reversal of 42646505 is 50564624.

It is not a de Polignac number, because 42646505 - 2²⁴ = 25869289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261554 + ... + 261716.

It is an arithmetic number, because the mean of its divisors is an integer number (1806624).

Almost surely, 2^42646505 is an apocalyptic number.

It is an amenable number.

42646505 is a deficient number, since it is larger than the sum of its proper divisors (15165463).

42646505 is a wasteful number, since it uses less digits than its factorization.

42646505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 42646505 is about 6530.4291589451. The cubic root of 42646505 is about 349.3771371035.

The spelling of 42646505 in words is "forty-two million, six hundred forty-six thousand, five hundred five".