42042406 has 8 divisors (see below), whose sum is σ = 72072720. Its totient is φ = 18018168.

The previous prime is 42042389. The next prime is 42042439. The reversal of 42042406 is 60424024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501501 + ... + 1501528.

It is an arithmetic number, because the mean of its divisors is an integer number (9009090).

Almost surely, 2^42042406 is an apocalyptic number.

42042406 is a deficient number, since it is larger than the sum of its proper divisors (30030314).

42042406 is a wasteful number, since it uses less digits than its factorization.

42042406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003038.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 42042406 is about 6484.0115669237. The cubic root of 42042406 is about 347.7196127457.

The spelling of 42042406 in words is "forty-two million, forty-two thousand, four hundred six".