681252424 has 32 divisors (see below), whose sum is σ = 1358506080. Its totient is φ = 319162624.

The previous prime is 681252419. The next prime is 681252443. The reversal of 681252424 is 424252186.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 681252424.

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, 19839 + ... + 41905.

It is an arithmetic number, because the mean of its divisors is an integer number (42453315).

Almost surely, 2^681252424 is an apocalyptic number.

It is an amenable number.

681252424 is a deficient number, since it is larger than the sum of its proper divisors (677253656).

681252424 is a wasteful number, since it uses less digits than its factorization.

681252424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22317 (or 22313 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 681252424 is about 26100.8127076534. The cubic root of 681252424 is about 879.9054753843.

The spelling of 681252424 in words is "six hundred eighty-one million, two hundred fifty-two thousand, four hundred twenty-four".