42155194 has 8 divisors (see below), whose sum is σ = 64176768. Its totient is φ = 20762940.

The previous prime is 42155147. The next prime is 42155203. The reversal of 42155194 is 49155124.

42155194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157162 + ... + 157429.

It is an arithmetic number, because the mean of its divisors is an integer number (8022096).

Almost surely, 2^42155194 is an apocalyptic number.

42155194 is a deficient number, since it is larger than the sum of its proper divisors (22021574).

42155194 is a wasteful number, since it uses less digits than its factorization.

42155194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314660.

The product of its digits is 7200, while the sum is 31.

The square root of 42155194 is about 6492.7031350586. The cubic root of 42155194 is about 348.0302798772.

It can be divided in two parts, 4215 and 5194, that added together give a square (9409 = 97²).

The spelling of 42155194 in words is "forty-two million, one hundred fifty-five thousand, one hundred ninety-four".