681142026 has 32 divisors (see below), whose sum is σ = 1443536640. Its totient is φ = 213526016.

The previous prime is 681142003. The next prime is 681142037. The reversal of 681142026 is 620241186.

It is a junction number, because it is equal to n+sod(n) for n = 681141984 and 681142002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248230 + ... + 250958.

It is an arithmetic number, because the mean of its divisors is an integer number (45110520).

Almost surely, 2^681142026 is an apocalyptic number.

681142026 is an abundant number, since it is smaller than the sum of its proper divisors (762394614).

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

681142026 is a wasteful number, since it uses less digits than its factorization.

681142026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5198.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 681142026 is about 26098.6977836060. The cubic root of 681142026 is about 879.8579428061.

The spelling of 681142026 in words is "six hundred eighty-one million, one hundred forty-two thousand, twenty-six".