247143260 has 144 divisors (see below), whose sum is σ = 685067040. Its totient is φ = 74027520.

The previous prime is 247143233. The next prime is 247143287. The reversal of 247143260 is 62341742.

It is an interprime number because it is at equal distance from previous prime (247143233) and next prime (247143287).

It is a super-2 number, since 2×247143260² = 122159581926855200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 241550 + ... + 242570.

It is an arithmetic number, because the mean of its divisors is an integer number (4757410).

Almost surely, 2^247143260 is an apocalyptic number.

247143260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247143260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342533520).

247143260 is an abundant number, since it is smaller than the sum of its proper divisors (437923780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247143260 is a wasteful number, since it uses less digits than its factorization.

247143260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 247143260 is about 15720.7906925829. The cubic root of 247143260 is about 627.5518155336.

The spelling of 247143260 in words is "two hundred forty-seven million, one hundred forty-three thousand, two hundred sixty".