42153918 has 8 divisors (see below), whose sum is σ = 84307848. Its totient is φ = 14051304.

The previous prime is 42153887. The next prime is 42153929. The reversal of 42153918 is 81935124.

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

42153918 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 3512821 + ... + 3512832.

It is an arithmetic number, because the mean of its divisors is an integer number (10538481).

Almost surely, 2^42153918 is an apocalyptic number.

42153918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42153918 is a wasteful number, since it uses less digits than its factorization.

42153918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025658.

The product of its digits is 8640, while the sum is 33.

The square root of 42153918 is about 6492.6048701580. The cubic root of 42153918 is about 348.0267683201.

It can be divided in two parts, 42153 and 918, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 42153918 in words is "forty-two million, one hundred fifty-three thousand, nine hundred eighteen".