725180081 has 2 divisors, whose sum is σ = 725180082. Its totient is φ = 725180080.

The previous prime is 725180077. The next prime is 725180107. The reversal of 725180081 is 180081527.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625000000 + 100180081 = 25000^2 + 10009^2 .

It is a cyclic number.

It is not a de Polignac number, because 725180081 - 2² = 725180077 is a prime.

It is a super-2 number, since 2×725180081² = 1051772299758333122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (725180381) 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 as a sum of consecutive naturals, namely, 362590040 + 362590041.

It is an arithmetic number, because the mean of its divisors is an integer number (362590041).

Almost surely, 2^725180081 is an apocalyptic number.

It is an amenable number.

725180081 is a deficient number, since it is larger than the sum of its proper divisors (1).

725180081 is an equidigital number, since it uses as much as digits as its factorization.

725180081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 725180081 is about 26929.1678482645. The cubic root of 725180081 is about 898.4252631504.

The spelling of 725180081 in words is "seven hundred twenty-five million, one hundred eighty thousand, eighty-one".