42906385 has 24 divisors (see below), whose sum is σ = 57116736. Its totient is φ = 30877440.

The previous prime is 42906379. The next prime is 42906443. The reversal of 42906385 is 58360924.

It is not a de Polignac number, because 42906385 - 2⁷ = 42906257 is a prime.

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32590 + ... + 33880.

It is an arithmetic number, because the mean of its divisors is an integer number (2379864).

Almost surely, 2^42906385 is an apocalyptic number.

It is an amenable number.

42906385 is a deficient number, since it is larger than the sum of its proper divisors (14210351).

42906385 is a wasteful number, since it uses less digits than its factorization.

42906385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 42906385 is about 6550.2965581720. The cubic root of 42906385 is about 350.0853805308.

The spelling of 42906385 in words is "forty-two million, nine hundred six thousand, three hundred eighty-five".