247575 has 12 divisors (see below), whose sum is σ = 409448. Its totient is φ = 132000.

The previous prime is 247553. The next prime is 247579. The reversal of 247575 is 575742.

It is not a de Polignac number, because 247575 - 2¹¹ = 245527 is a prime.

It is a super-2 number, since 2×247575² = 122586761250, which contains 22 as substring.

It is a Duffinian number.

247575 is a lucky number.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

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 247575.

It is not an unprimeable number, because it can be changed into a prime (247579) 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 11 ways as a sum of consecutive naturals, for example, 1576 + ... + 1725.

2²⁴⁷⁵⁷⁵ is an apocalyptic number.

247575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

247575 is a deficient number, since it is larger than the sum of its proper divisors (161873).

247575 is a wasteful number, since it uses less digits than its factorization.

247575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314 (or 3309 counting only the distinct ones).

The product of its digits is 9800, while the sum is 30.

The square root of 247575 is about 497.5690906799. The cubic root of 247575 is about 62.7917030974.

The spelling of 247575 in words is "two hundred forty-seven thousand, five hundred seventy-five".