120725681 has 2 divisors, whose sum is σ = 120725682. Its totient is φ = 120725680.

The previous prime is 120725663. The next prime is 120725707. The reversal of 120725681 is 186527021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116294656 + 4431025 = 10784^2 + 2105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120725681 is a prime.

It is a super-2 number, since 2×120725681² = 29149380105827522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (120725641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60362840 + 60362841.

It is an arithmetic number, because the mean of its divisors is an integer number (60362841).

Almost surely, 2^120725681 is an apocalyptic number.

It is an amenable number.

120725681 is a deficient number, since it is larger than the sum of its proper divisors (1).

120725681 is an equidigital number, since it uses as much as digits as its factorization.

120725681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 120725681 is about 10987.5238793825. The cubic root of 120725681 is about 494.2346858146.

The spelling of 120725681 in words is "one hundred twenty million, seven hundred twenty-five thousand, six hundred eighty-one".