247542 has 8 divisors (see below), whose sum is σ = 495096. Its totient is φ = 82512.
The previous prime is 247531. The next prime is 247547. The reversal of 247542 is 245742.
It is a sphenic number, since it is the product of 3 distinct primes.
247542 is an admirable number.
It is a super-2 number, since 2×2475422 = 122554083528, which contains 22 as substring.
It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a plaindrome in base 13.
It is a zygodrome in base 13.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247542.
It is not an unprimeable number, because it can be changed into a prime (247547) by changing a digit.
247542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20623 + ... + 20634.
It is an arithmetic number, because the mean of its divisors is an integer number (61887).
2247542 is an apocalyptic number.
247542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
247542 is a wasteful number, since it uses less digits than its factorization.
247542 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 41262.
The product of its digits is 2240, while the sum is 24.
The square root of 247542 is about 497.5359283509. The cubic root of 247542 is about 62.7889130765.
The spelling of 247542 in words is "two hundred forty-seven thousand, five hundred forty-two".
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