247172841 has 12 divisors (see below), whose sum is σ = 357216132. Its totient is φ = 164694816.

The previous prime is 247172833. The next prime is 247172851. The reversal of 247172841 is 148271742.

It can be written as a sum of positive squares in 2 ways, for example, as 102090816 + 145082025 = 10104^2 + 12045^2 .

It is not a de Polignac number, because 247172841 - 2³ = 247172833 is a prime.

It is a super-2 number, since 2×247172841² = 122188826656022562, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 247172796 and 247172805.

It is not an unprimeable number, because it can be changed into a prime (247172801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13995 + ... + 26271.

It is an arithmetic number, because the mean of its divisors is an integer number (29768011).

Almost surely, 2^247172841 is an apocalyptic number.

It is an amenable number.

247172841 is a deficient number, since it is larger than the sum of its proper divisors (110043291).

247172841 is a wasteful number, since it uses less digits than its factorization.

247172841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14520 (or 14517 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 247172841 is about 15721.7314886116. The cubic root of 247172841 is about 627.5768521186.

The spelling of 247172841 in words is "two hundred forty-seven million, one hundred seventy-two thousand, eight hundred forty-one".