247021424 has 40 divisors (see below), whose sum is σ = 545746320. Its totient is φ = 107301888.

The previous prime is 247021421. The next prime is 247021427. The reversal of 247021424 is 424120742.

It is an interprime number because it is at equal distance from previous prime (247021421) and next prime (247021427).

It is a super-2 number, since 2×247021424² = 122039167829975552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 247021393 and 247021402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247021421) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31394 + ... + 38465.

It is an arithmetic number, because the mean of its divisors is an integer number (13643658).

Almost surely, 2^247021424 is an apocalyptic number.

It is an amenable number.

247021424 is an abundant number, since it is smaller than the sum of its proper divisors (298724896).

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

247021424 is a wasteful number, since it uses less digits than its factorization.

247021424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69897 (or 69891 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 247021424 is about 15716.9152189607. The cubic root of 247021424 is about 627.4486756644.

The spelling of 247021424 in words is "two hundred forty-seven million, twenty-one thousand, four hundred twenty-four".