247671 has 8 divisors (see below), whose sum is σ = 366960. Its totient is φ = 165096.

The previous prime is 247651. The next prime is 247691. The reversal of 247671 is 176742.

It is an interprime number because it is at equal distance from previous prime (247651) and next prime (247691).

It is not a de Polignac number, because 247671 - 2⁶ = 247607 is a prime.

It is a super-2 number, since 2×247671² = 122681848482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9173 = 247671 / (2 + 4 + 7 + 6 + 7 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4560 + ... + 4613.

It is an arithmetic number, because the mean of its divisors is an integer number (45870).

2²⁴⁷⁶⁷¹ is an apocalyptic number.

247671 is a deficient number, since it is larger than the sum of its proper divisors (119289).

247671 is an equidigital number, since it uses as much as digits as its factorization.

247671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9182 (or 9176 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 247671 is about 497.6655503448. The cubic root of 247671 is about 62.7998181124.

The spelling of 247671 in words is "two hundred forty-seven thousand, six hundred seventy-one".