247155 has 8 divisors (see below), whose sum is σ = 395472. Its totient is φ = 131808.

The previous prime is 247141. The next prime is 247183. The reversal of 247155 is 551742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 247155 - 2⁸ = 246899 is a prime.

It is a super-2 number, since 2×247155² = 122171188050, which contains 22 as substring.

247155 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247155.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8224 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (49434).

2²⁴⁷¹⁵⁵ is an apocalyptic number.

247155 is a deficient number, since it is larger than the sum of its proper divisors (148317).

247155 is a wasteful number, since it uses less digits than its factorization.

247155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16485.

The product of its digits is 1400, while the sum is 24.

The square root of 247155 is about 497.1468595898. The cubic root of 247155 is about 62.7561752202.

Adding to 247155 its reverse (551742), we get a palindrome (798897).

The spelling of 247155 in words is "two hundred forty-seven thousand, one hundred fifty-five".