681246105 has 16 divisors (see below), whose sum is σ = 1127580480. Its totient is φ = 350802368.

The previous prime is 681246101. The next prime is 681246113. The reversal of 681246105 is 501642186.

It is a cyclic number.

It is not a de Polignac number, because 681246105 - 2² = 681246101 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681246101) 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 15 ways as a sum of consecutive naturals, for example, 782607 + ... + 783476.

It is an arithmetic number, because the mean of its divisors is an integer number (70473780).

Almost surely, 2^681246105 is an apocalyptic number.

It is an amenable number.

681246105 is a deficient number, since it is larger than the sum of its proper divisors (446334375).

681246105 is a wasteful number, since it uses less digits than its factorization.

681246105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566120.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 681246105 is about 26100.6916575021. The cubic root of 681246105 is about 879.9027548362.

The spelling of 681246105 in words is "six hundred eighty-one million, two hundred forty-six thousand, one hundred five".