42355905 has 16 divisors (see below), whose sum is σ = 68065920. Its totient is φ = 22491008.

The previous prime is 42355877. The next prime is 42355919. The reversal of 42355905 is 50955324.

It is a cyclic number.

It is not a de Polignac number, because 42355905 - 2²² = 38161601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2565 + ... + 9554.

It is an arithmetic number, because the mean of its divisors is an integer number (4254120).

Almost surely, 2^42355905 is an apocalyptic number.

It is an amenable number.

42355905 is a deficient number, since it is larger than the sum of its proper divisors (25710015).

42355905 is a wasteful number, since it uses less digits than its factorization.

42355905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 42355905 is about 6508.1414397660. The cubic root of 42355905 is about 348.5817574699.

The spelling of 42355905 in words is "forty-two million, three hundred fifty-five thousand, nine hundred five".