247491130 has 8 divisors (see below), whose sum is σ = 445484052. Its totient is φ = 98996448.

The previous prime is 247491119. The next prime is 247491137. The reversal of 247491130 is 31194742.

It can be written as a sum of positive squares in 2 ways, for example, as 230705721 + 16785409 = 15189^2 + 4097^2 .

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

It is a super-2 number, since 2×247491130² = 122503718857353800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247491092 and 247491101.

It is not an unprimeable number, because it can be changed into a prime (247491137) 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 3 ways as a sum of consecutive naturals, for example, 12374547 + ... + 12374566.

Almost surely, 2^247491130 is an apocalyptic number.

247491130 is a deficient number, since it is larger than the sum of its proper divisors (197992922).

247491130 is a wasteful number, since it uses less digits than its factorization.

247491130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24749120.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 247491130 is about 15731.8508129209. The cubic root of 247491130 is about 627.8461173127.

The spelling of 247491130 in words is "two hundred forty-seven million, four hundred ninety-one thousand, one hundred thirty".