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142943 = 223641
BaseRepresentation
bin100010111001011111
321021002012
4202321133
514033233
63021435
71133513
oct427137
9237065
10142943
1198439
126a87b
13500a8
143a143
152c548
hex22e5f

142943 has 4 divisors (see below), whose sum is σ = 143808. Its totient is φ = 142080.

The previous prime is 142939. The next prime is 142949. The reversal of 142943 is 349241.

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 142943 - 22 = 142939 is a prime.

It is a Duffinian number.

Its product of digits (864) is a multiple of the sum of its prime divisors (864).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142949) 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 3 ways as a sum of consecutive naturals, for example, 98 + ... + 543.

It is an arithmetic number, because the mean of its divisors is an integer number (35952).

2142943 is an apocalyptic number.

142943 is a deficient number, since it is larger than the sum of its proper divisors (865).

142943 is an equidigital number, since it uses as much as digits as its factorization.

142943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its digits is 864, while the sum is 23.

The square root of 142943 is about 378.0780342733. The cubic root of 142943 is about 52.2862663446.

The spelling of 142943 in words is "one hundred forty-two thousand, nine hundred forty-three".

Divisors: 1 223 641 142943