42100406 has 4 divisors (see below), whose sum is σ = 63150612. Its totient is φ = 21050202.

The previous prime is 42100403. The next prime is 42100423. The reversal of 42100406 is 60400124.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42100403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10525100 + ... + 10525103.

It is an arithmetic number, because the mean of its divisors is an integer number (15787653).

Almost surely, 2^42100406 is an apocalyptic number.

42100406 is a deficient number, since it is larger than the sum of its proper divisors (21050206).

42100406 is a wasteful number, since it uses less digits than its factorization.

42100406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21050205.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 42100406 is about 6488.4825652844. The cubic root of 42100406 is about 347.8794392349.

The spelling of 42100406 in words is "forty-two million, one hundred thousand, four hundred six".