247449 has 4 divisors (see below), whose sum is σ = 329936. Its totient is φ = 164964.

The previous prime is 247439. The next prime is 247451. The reversal of 247449 is 944742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 247449 - 2⁴ = 247433 is a prime.

It is a super-2 number, since 2×247449² = 122462015202, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (247409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41239 + ... + 41244.

It is an arithmetic number, because the mean of its divisors is an integer number (82484).

2²⁴⁷⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

247449 is a deficient number, since it is larger than the sum of its proper divisors (82487).

247449 is an equidigital number, since it uses as much as digits as its factorization.

247449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82486.

The product of its digits is 8064, while the sum is 30.

The square root of 247449 is about 497.4424589840. The cubic root of 247449 is about 62.7810489560.

It can be divided in two parts, 24744 and 9, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 247449 in words is "two hundred forty-seven thousand, four hundred forty-nine".