42017158 has 4 divisors (see below), whose sum is σ = 63025740. Its totient is φ = 21008578.

The previous prime is 42017153. The next prime is 42017191. The reversal of 42017158 is 85171024.

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 (42017153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10504288 + ... + 10504291.

It is an arithmetic number, because the mean of its divisors is an integer number (15756435).

Almost surely, 2^42017158 is an apocalyptic number.

42017158 is a deficient number, since it is larger than the sum of its proper divisors (21008582).

42017158 is a wasteful number, since it uses less digits than its factorization.

42017158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21008581.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 42017158 is about 6482.0643316771. The cubic root of 42017158 is about 347.6499926992.

It can be divided in two parts, 420 and 17158, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 42017158 in words is "forty-two million, seventeen thousand, one hundred fifty-eight".