247845 has 32 divisors (see below), whose sum is σ = 451584. Its totient is φ = 115200.

The previous prime is 247829. The next prime is 247847. The reversal of 247845 is 548742.

It is not a de Polignac number, because 247845 - 2⁴ = 247829 is a prime.

It is a super-2 number, since 2×247845² = 122854288050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6025 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (14112).

2²⁴⁷⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

247845 is a deficient number, since it is larger than the sum of its proper divisors (203739).

247845 is a wasteful number, since it uses less digits than its factorization.

247845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93.

The product of its digits is 8960, while the sum is 30.

The square root of 247845 is about 497.8403358508. The cubic root of 247845 is about 62.8145212339.

The spelling of 247845 in words is "two hundred forty-seven thousand, eight hundred forty-five".