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42170819 = 311360349
BaseRepresentation
bin1010000011011…
…1100111000011
32221100111111012
42200313213003
541243431234
64103511135
71021305665
oct240674703
987314435
1042170819
1121893619
12121584ab
138976962
14585a535
153a800ce
hex28379c3

42170819 has 4 divisors (see below), whose sum is σ = 43531200. Its totient is φ = 40810440.

The previous prime is 42170783. The next prime is 42170839. The reversal of 42170819 is 91807124.

42170819 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 cyclic number.

It is not a de Polignac number, because 42170819 - 212 = 42166723 is a prime.

It is a super-2 number, since 2×421708192 = 3556755950261522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42170839) 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 in 3 ways as a sum of consecutive naturals, for example, 680144 + ... + 680205.

It is an arithmetic number, because the mean of its divisors is an integer number (10882800).

Almost surely, 242170819 is an apocalyptic number.

42170819 is a deficient number, since it is larger than the sum of its proper divisors (1360381).

42170819 is a wasteful number, since it uses less digits than its factorization.

42170819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360380.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 42170819 is about 6493.9062974453. The cubic root of 42170819 is about 348.0732741948.

The spelling of 42170819 in words is "forty-two million, one hundred seventy thousand, eight hundred nineteen".

Divisors: 1 31 1360349 42170819