247956 has 12 divisors (see below), whose sum is σ = 578592. Its totient is φ = 82648.

The previous prime is 247943. The next prime is 247957. The reversal of 247956 is 659742.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×247956² = 122964355872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247957) 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, 10320 + ... + 10343.

It is an arithmetic number, because the mean of its divisors is an integer number (48216).

2²⁴⁷⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

247956 is an abundant number, since it is smaller than the sum of its proper divisors (330636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247956 is a wasteful number, since it uses less digits than its factorization.

247956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20670 (or 20668 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 247956 is about 497.9518048968. The cubic root of 247956 is about 62.8238972165.

The spelling of 247956 in words is "two hundred forty-seven thousand, nine hundred fifty-six".