42170542 has 4 divisors (see below), whose sum is σ = 63255816. Its totient is φ = 21085270.

The previous prime is 42170539. The next prime is 42170543. The reversal of 42170542 is 24507124.

42170542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×42170542² = 3556709225147528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42170543) by changing a digit.

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 as a sum of consecutive naturals, namely, 10542634 + ... + 10542637.

It is an arithmetic number, because the mean of its divisors is an integer number (15813954).

Almost surely, 2^42170542 is an apocalyptic number.

42170542 is a deficient number, since it is larger than the sum of its proper divisors (21085274).

42170542 is a wasteful number, since it uses less digits than its factorization.

42170542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21085273.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 42170542 is about 6493.8849697234. The cubic root of 42170542 is about 348.0725120840.

Adding to 42170542 its reverse (24507124), we get a palindrome (66677666).

The spelling of 42170542 in words is "forty-two million, one hundred seventy thousand, five hundred forty-two".