247495 has 4 divisors (see below), whose sum is σ = 297000. Its totient is φ = 197992.

The previous prime is 247463. The next prime is 247501. The reversal of 247495 is 594742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 594742 = 2 ⋅297371.

It is a cyclic number.

It is not a de Polignac number, because 247495 - 2⁵ = 247463 is a prime.

It is a super-2 number, since 2×247495² = 122507550050, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

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, 24745 + ... + 24754.

It is an arithmetic number, because the mean of its divisors is an integer number (74250).

2²⁴⁷⁴⁹⁵ is an apocalyptic number.

247495 is a deficient number, since it is larger than the sum of its proper divisors (49505).

247495 is an equidigital number, since it uses as much as digits as its factorization.

247495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49504.

The product of its digits is 10080, while the sum is 31.

The square root of 247495 is about 497.4886933389. The cubic root of 247495 is about 62.7849389823.

It can be divided in two parts, 247 and 495, that multiplied together give a triangular number (122265 = T₄₉₄).

The spelling of 247495 in words is "two hundred forty-seven thousand, four hundred ninety-five".