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42256105 = 553159457
BaseRepresentation
bin1010000100110…
…0011011101001
32221111211110221
42201030123221
541304143410
64105410041
71022112433
oct241143351
987454427
1042256105
1121941701
1212199921
1389a6718
14587d653
153a9a4da
hex284c6e9

42256105 has 8 divisors (see below), whose sum is σ = 51664392. Its totient is φ = 33166848.

The previous prime is 42256061. The next prime is 42256111. The reversal of 42256105 is 50165224.

It can be written as a sum of positive squares in 4 ways, for example, as 21270544 + 20985561 = 4612^2 + 4581^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42256105 - 29 = 42255593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42256105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79464 + ... + 79993.

It is an arithmetic number, because the mean of its divisors is an integer number (6458049).

Almost surely, 242256105 is an apocalyptic number.

It is an amenable number.

42256105 is a deficient number, since it is larger than the sum of its proper divisors (9408287).

42256105 is a wasteful number, since it uses less digits than its factorization.

42256105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159515.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 42256105 is about 6500.4695984213. The cubic root of 42256105 is about 348.3077632586.

The spelling of 42256105 in words is "forty-two million, two hundred fifty-six thousand, one hundred five".

Divisors: 1 5 53 265 159457 797285 8451221 42256105