247661241 has 8 divisors (see below), whose sum is σ = 330419520. Its totient is φ = 165005232.

The previous prime is 247661231. The next prime is 247661251. The reversal of 247661241 is 142166742.

It is an interprime number because it is at equal distance from previous prime (247661231) and next prime (247661251).

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

It is not a de Polignac number, because 247661241 - 2⁹ = 247660729 is a prime.

It is a super-2 number, since 2×247661241² = 122672180587320162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247661221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19725 + ... + 29738.

It is an arithmetic number, because the mean of its divisors is an integer number (41302440).

Almost surely, 2^247661241 is an apocalyptic number.

It is an amenable number.

247661241 is a deficient number, since it is larger than the sum of its proper divisors (82758279).

247661241 is a wasteful number, since it uses less digits than its factorization.

247661241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51135.

The product of its digits is 16128, while the sum is 33.

The square root of 247661241 is about 15737.2564635644. The cubic root of 247661241 is about 627.9899326621.

The spelling of 247661241 in words is "two hundred forty-seven million, six hundred sixty-one thousand, two hundred forty-one".