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BaseRepresentation
bin10001000110001…
…11010010110101
3100222212121212211
420203013102311
5243204011040
622122013421
73361033552
oct1043072265
9328777784
10143422645
1173a5a613
1240047271
1323938192
1415095a29
15c8d08ea
hex88c74b5

143422645 has 4 divisors (see below), whose sum is σ = 172107180. Its totient is φ = 114738112.

The previous prime is 143422639. The next prime is 143422663. The reversal of 143422645 is 546224341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546224341 = 1342017257.

It can be written as a sum of positive squares in 2 ways, for example, as 38031889 + 105390756 = 6167^2 + 10266^2 .

It is a cyclic number.

It is not a de Polignac number, because 143422645 - 215 = 143389877 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 14342260 + ... + 14342269.

It is an arithmetic number, because the mean of its divisors is an integer number (43026795).

Almost surely, 2143422645 is an apocalyptic number.

It is an amenable number.

143422645 is a deficient number, since it is larger than the sum of its proper divisors (28684535).

143422645 is an equidigital number, since it uses as much as digits as its factorization.

143422645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28684534.

The product of its digits is 23040, while the sum is 31.

The square root of 143422645 is about 11975.9193801562. The cubic root of 143422645 is about 523.4468321407.

Adding to 143422645 its reverse (546224341), we get a palindrome (689646986).

The spelling of 143422645 in words is "one hundred forty-three million, four hundred twenty-two thousand, six hundred forty-five".

Divisors: 1 5 28684529 143422645