247052945 has 8 divisors (see below), whose sum is σ = 296559144. Its totient is φ = 197578624.

The previous prime is 247052941. The next prime is 247052947. The reversal of 247052945 is 549250742.

It can be written as a sum of positive squares in 4 ways, for example, as 8288641 + 238764304 = 2879^2 + 15452^2 .

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 247052945 - 2² = 247052941 is a prime.

It is a super-2 number, since 2×247052945² = 122070315266346050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247052899 and 247052908.

It is not an unprimeable number, because it can be changed into a prime (247052941) 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, 15227 + ... + 26943.

It is an arithmetic number, because the mean of its divisors is an integer number (37069893).

Almost surely, 2^247052945 is an apocalyptic number.

It is an amenable number.

247052945 is a deficient number, since it is larger than the sum of its proper divisors (49506199).

247052945 is a wasteful number, since it uses less digits than its factorization.

247052945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15939.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 247052945 is about 15717.9179600862. The cubic root of 247052945 is about 627.4753629158.

The spelling of 247052945 in words is "two hundred forty-seven million, fifty-two thousand, nine hundred forty-five".