247421272 has 64 divisors (see below), whose sum is σ = 553132800. Its totient is φ = 101512320.

The previous prime is 247421263. The next prime is 247421303. The reversal of 247421272 is 272124742.

It is a super-2 number, since 2×247421272² = 122434571676195968, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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 15 ways as a sum of consecutive naturals, for example, 212163 + ... + 213325.

It is an arithmetic number, because the mean of its divisors is an integer number (8642700).

Almost surely, 2^247421272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247421272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276566400).

247421272 is an abundant number, since it is smaller than the sum of its proper divisors (305711528).

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

247421272 is a wasteful number, since it uses less digits than its factorization.

247421272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1332 counting only the distinct ones).

The product of its digits is 12544, while the sum is 31.

The square root of 247421272 is about 15729.6303834515. The cubic root of 247421272 is about 627.7870388299.

The spelling of 247421272 in words is "two hundred forty-seven million, four hundred twenty-one thousand, two hundred seventy-two".