247528 has 8 divisors (see below), whose sum is σ = 464130. Its totient is φ = 123760.

The previous prime is 247519. The next prime is 247529. The reversal of 247528 is 825742.

247528 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 228484 + 19044 = 478^2 + 138^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×247528² = 122540221568, which contains 22 as substring.

247528 is a nontrivial repdigit in base 13.

It is a plaindrome in base 13.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 247496 and 247505.

It is not an unprimeable number, because it can be changed into a prime (247529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15463 + ... + 15478.

2²⁴⁷⁵²⁸ is an apocalyptic number.

It is an amenable number.

247528 is a deficient number, since it is larger than the sum of its proper divisors (216602).

247528 is a wasteful number, since it uses less digits than its factorization.

247528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30947 (or 30943 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 247528 is about 497.5218588163. The cubic root of 247528 is about 62.7877293564.

The spelling of 247528 in words is "two hundred forty-seven thousand, five hundred twenty-eight".