247130865 has 16 divisors (see below), whose sum is σ = 439344000. Its totient is φ = 131803056.

The previous prime is 247130861. The next prime is 247130879. The reversal of 247130865 is 568031742.

It is not a de Polignac number, because 247130865 - 2² = 247130861 is a prime.

It is a super-2 number, since 2×247130865² = 122147328871296450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (247130861) 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, 915165 + ... + 915434.

It is an arithmetic number, because the mean of its divisors is an integer number (27459000).

Almost surely, 2^247130865 is an apocalyptic number.

It is an amenable number.

247130865 is a deficient number, since it is larger than the sum of its proper divisors (192213135).

247130865 is a wasteful number, since it uses less digits than its factorization.

247130865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830613 (or 1830607 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 247130865 is about 15720.3964644662. The cubic root of 247130865 is about 627.5413241358.

The spelling of 247130865 in words is "two hundred forty-seven million, one hundred thirty thousand, eight hundred sixty-five".