42057905 has 8 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 33596656.

The previous prime is 42057901. The next prime is 42057907. The reversal of 42057905 is 50975024.

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 42057905 - 2² = 42057901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42057901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255 + ... + 9444.

It is an arithmetic number, because the mean of its divisors is an integer number (6318000).

Almost surely, 2^42057905 is an apocalyptic number.

It is an amenable number.

42057905 is a deficient number, since it is larger than the sum of its proper divisors (8486095).

42057905 is a wasteful number, since it uses less digits than its factorization.

42057905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12423.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 42057905 is about 6485.2066273944. The cubic root of 42057905 is about 347.7623366260.

The spelling of 42057905 in words is "forty-two million, fifty-seven thousand, nine hundred five".