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42919 = 167257
BaseRepresentation
bin1010011110100111
32011212121
422132213
52333134
6530411
7236062
oct123647
964777
1042919
112a278
1220a07
13166c6
14118d9
15cab4
hexa7a7

42919 has 4 divisors (see below), whose sum is σ = 43344. Its totient is φ = 42496.

The previous prime is 42901. The next prime is 42923. The reversal of 42919 is 91924.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42919 - 29 = 42407 is a prime.

It is a super-2 number, since 2×429192 = 3684081122, which contains 22 as substring.

It is a Duffinian number.

42919 is an undulating number in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 42893 and 42902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39 + ... + 295.

It is an arithmetic number, because the mean of its divisors is an integer number (10836).

242919 is an apocalyptic number.

42919 is a deficient number, since it is larger than the sum of its proper divisors (425).

42919 is a wasteful number, since it uses less digits than its factorization.

42919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424.

The product of its digits is 648, while the sum is 25.

The square root of 42919 is about 207.1690131270. The cubic root of 42919 is about 35.0119686958.

It can be divided in two parts, 42 and 919, that added together give a square (961 = 312).

The spelling of 42919 in words is "forty-two thousand, nine hundred nineteen".

Divisors: 1 167 257 42919