247505 has 8 divisors (see below), whose sum is σ = 302400. Its totient is φ = 194416.

The previous prime is 247501. The next prime is 247519. The reversal of 247505 is 505742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247505 - 2² = 247501 is a prime.

It is a super-2 number, since 2×247505² = 122517450050, which contains 22 as substring.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247505.

It is not an unprimeable number, because it can be changed into a prime (247501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125 + ... + 714.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2²⁴⁷⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

247505 is a deficient number, since it is larger than the sum of its proper divisors (54895).

247505 is an equidigital number, since it uses as much as digits as its factorization.

247505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 247505 is about 497.4987437170. The cubic root of 247505 is about 62.7857845764.

The spelling of 247505 in words is "two hundred forty-seven thousand, five hundred five".