23542 has 8 divisors (see below), whose sum is σ = 36000.
Its totient is φ = 11544.
The previous prime is 23539. The next prime is 23549. The reversal of 23542 is 24532.
Subtracting 23542 from its reverse (24532), we obtain a triangular number (990 = T44).
It can be divided in two parts, 235 and 42, that multiplied together give a triangular number (9870 = T140).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23549) 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, 84 + ... + 232.
It is an arithmetic number, because the mean of its divisors is an integer number (4500).
223542 is an apocalyptic number.
23542 is a deficient number, since it is larger than the sum of its proper divisors (12458).
23542 is a wasteful number, since it uses less digits than its factorization.
23542 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 230.
The product of its digits is 240, while the sum is 16.
The square root of 23542 is about 153.4340249097.
The cubic root of 23542 is about 28.6603255008.
The spelling of 23542 in words is "twenty-three thousand, five hundred forty-two".