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8542 = 24271
BaseRepresentation
bin10000101011110
3102201101
42011132
5233132
6103314
733622
oct20536
912641
108542
116466
124b3a
133b71
143182
1527e7
hex215e

8542 has 4 divisors (see below), whose sum is σ = 12816. Its totient is φ = 4270.

The previous prime is 8539. The next prime is 8543. The reversal of 8542 is 2458.

It is a happy number.

8542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2458 = 21229.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2134 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (3204).

28542 is an apocalyptic number.

8542 is a deficient number, since it is larger than the sum of its proper divisors (4274).

8542 is a wasteful number, since it uses less digits than its factorization.

8542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273.

The product of its digits is 320, while the sum is 19.

The square root of 8542 is about 92.4229408751. The cubic root of 8542 is about 20.4418339277.

Subtracting from 8542 its reverse (2458), we obtain a square (6084 = 782).

It can be divided in two parts, 85 and 42, that multiplied together give a triangular number (3570 = T84).

The spelling of 8542 in words is "eight thousand, five hundred forty-two".

Divisors: 1 2 4271 8542