247091 has 8 divisors (see below), whose sum is σ = 270480. Its totient is φ = 224352.

The previous prime is 247087. The next prime is 247099. The reversal of 247091 is 190742.

247091 is nontrivially palindromic in base 12.

247091 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 247091 - 2² = 247087 is a prime.

It is a super-2 number, since 2×247091² = 122107924562, which contains 22 as substring.

It is a Duffinian number.

247091 is an undulating number in base 12.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247091.

It is not an unprimeable number, because it can be changed into a prime (247099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965 + ... + 1193.

It is an arithmetic number, because the mean of its divisors is an integer number (33810).

2²⁴⁷⁰⁹¹ is an apocalyptic number.

247091 is a deficient number, since it is larger than the sum of its proper divisors (23389).

247091 is a wasteful number, since it uses less digits than its factorization.

247091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 247091 is about 497.0824881245. The cubic root of 247091 is about 62.7507579153.

The spelling of 247091 in words is "two hundred forty-seven thousand, ninety-one".