681468142 has 4 divisors (see below), whose sum is σ = 1022202216. Its totient is φ = 340734070.

The previous prime is 681468121. The next prime is 681468167. The reversal of 681468142 is 241864186.

681468142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 681468095 and 681468104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170367034 + ... + 170367037.

It is an arithmetic number, because the mean of its divisors is an integer number (255550554).

Almost surely, 2^681468142 is an apocalyptic number.

681468142 is a deficient number, since it is larger than the sum of its proper divisors (340734074).

681468142 is a wasteful number, since it uses less digits than its factorization.

681468142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340734073.

The product of its digits is 73728, while the sum is 40.

The square root of 681468142 is about 26104.9447806350. The cubic root of 681468142 is about 879.9983393564.

The spelling of 681468142 in words is "six hundred eighty-one million, four hundred sixty-eight thousand, one hundred forty-two".