42189951 has 8 divisors (see below), whose sum is σ = 56368000. Its totient is φ = 28069272.

The previous prime is 42189947. The next prime is 42189989. The reversal of 42189951 is 15998124.

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

It is not a de Polignac number, because 42189951 - 2² = 42189947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42189911) 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, 12595 + ... + 15588.

It is an arithmetic number, because the mean of its divisors is an integer number (7046000).

Almost surely, 2^42189951 is an apocalyptic number.

42189951 is a deficient number, since it is larger than the sum of its proper divisors (14178049).

42189951 is a wasteful number, since it uses less digits than its factorization.

42189951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28685.

The product of its digits is 25920, while the sum is 39.

The square root of 42189951 is about 6495.3792037109. The cubic root of 42189951 is about 348.1259040403.

The spelling of 42189951 in words is "forty-two million, one hundred eighty-nine thousand, nine hundred fifty-one".