247242975 has 60 divisors (see below), whose sum is σ = 477223176. Its totient is φ = 112943040.

The previous prime is 247242971. The next prime is 247243033. The reversal of 247242975 is 579242742.

It is not a de Polignac number, because 247242975 - 2² = 247242971 is a prime.

It is a super-2 number, since 2×247242975² = 122258177373701250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247242971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 179389 + ... + 180761.

Almost surely, 2^247242975 is an apocalyptic number.

247242975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

247242975 is a deficient number, since it is larger than the sum of its proper divisors (229980201).

247242975 is an equidigital number, since it uses as much as digits as its factorization.

247242975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414 (or 1388 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 247242975 is about 15723.9618099256. The cubic root of 247242975 is about 627.6362037211.

The spelling of 247242975 in words is "two hundred forty-seven million, two hundred forty-two thousand, nine hundred seventy-five".