247755 has 16 divisors (see below), whose sum is σ = 403200. Its totient is φ = 129888.

The previous prime is 247739. The next prime is 247759. The reversal of 247755 is 557742.

It is not a de Polignac number, because 247755 - 2⁴ = 247739 is a prime.

It is a super-2 number, since 2×247755² = 122765080050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146 + ... + 1344.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2²⁴⁷⁷⁵⁵ is an apocalyptic number.

247755 is a deficient number, since it is larger than the sum of its proper divisors (155445).

247755 is a wasteful number, since it uses less digits than its factorization.

247755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290.

The product of its digits is 9800, while the sum is 30.

The square root of 247755 is about 497.7499372175. The cubic root of 247755 is about 62.8069170306.

The spelling of 247755 in words is "two hundred forty-seven thousand, seven hundred fifty-five".