42235478 has 4 divisors (see below), whose sum is σ = 63353220. Its totient is φ = 21117738.

The previous prime is 42235471. The next prime is 42235481. The reversal of 42235478 is 87453224.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42235471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10558868 + ... + 10558871.

It is an arithmetic number, because the mean of its divisors is an integer number (15838305).

Almost surely, 2^42235478 is an apocalyptic number.

42235478 is a deficient number, since it is larger than the sum of its proper divisors (21117742).

42235478 is a wasteful number, since it uses less digits than its factorization.

42235478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21117741.

The product of its digits is 53760, while the sum is 35.

The square root of 42235478 is about 6498.8828270711. The cubic root of 42235478 is about 348.2510794290.

The spelling of 42235478 in words is "forty-two million, two hundred thirty-five thousand, four hundred seventy-eight".