247205842 has 16 divisors (see below), whose sum is σ = 412215552. Its totient is φ = 110414160.

The previous prime is 247205797. The next prime is 247205867. The reversal of 247205842 is 248502742.

It is a super-2 number, since 2×247205842² = 122221456637857928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247205798 and 247205807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152548 + ... + 154159.

It is an arithmetic number, because the mean of its divisors is an integer number (25763472).

Almost surely, 2^247205842 is an apocalyptic number.

247205842 is a deficient number, since it is larger than the sum of its proper divisors (165009710).

247205842 is a wasteful number, since it uses less digits than its factorization.

247205842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306753.

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 247205842 is about 15722.7809881077. The cubic root of 247205842 is about 627.6047809449.

The spelling of 247205842 in words is "two hundred forty-seven million, two hundred five thousand, eight hundred forty-two".