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42130454 = 2174328817
BaseRepresentation
bin1010000010110…
…1110000010110
32221021110010012
42200231300112
541241133304
64103000222
71021050212
oct240556026
987243105
1042130454
1121866263
1212139072
138961482
145849942
153a7316e
hex282dc16

42130454 has 16 divisors (see below), whose sum is σ = 68471568. Its totient is φ = 19364352.

The previous prime is 42130453. The next prime is 42130469. The reversal of 42130454 is 45403124.

It is a super-2 number, since 2×421304542 = 3549950308492232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42130453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12947 + ... + 15870.

It is an arithmetic number, because the mean of its divisors is an integer number (4279473).

Almost surely, 242130454 is an apocalyptic number.

42130454 is a deficient number, since it is larger than the sum of its proper divisors (26341114).

42130454 is a wasteful number, since it uses less digits than its factorization.

42130454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28879.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42130454 is about 6490.7976397358. The cubic root of 42130454 is about 347.9621826611.

Adding to 42130454 its reverse (45403124), we get a palindrome (87533578).

The spelling of 42130454 in words is "forty-two million, one hundred thirty thousand, four hundred fifty-four".

Divisors: 1 2 17 34 43 86 731 1462 28817 57634 489889 979778 1239131 2478262 21065227 42130454