247724 has 12 divisors (see below), whose sum is σ = 459144. Its totient is φ = 116544.

The previous prime is 247717. The next prime is 247729. The reversal of 247724 is 427742.

It is a super-2 number, since 2×247724² = 122734360352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 247693 and 247702.

It is not an unprimeable number, because it can be changed into a prime (247729) 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 3 ways as a sum of consecutive naturals, for example, 1754 + ... + 1889.

It is an arithmetic number, because the mean of its divisors is an integer number (38262).

2²⁴⁷⁷²⁴ is an apocalyptic number.

It is an amenable number.

247724 is a deficient number, since it is larger than the sum of its proper divisors (211420).

247724 is a wasteful number, since it uses less digits than its factorization.

247724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664 (or 3662 counting only the distinct ones).

The product of its digits is 3136, while the sum is 26.

The square root of 247724 is about 497.7187961088. The cubic root of 247724 is about 62.8042973786.

The spelling of 247724 in words is "two hundred forty-seven thousand, seven hundred twenty-four", and thus it is an iban number.