725326081 has 2 divisors, whose sum is σ = 725326082. Its totient is φ = 725326080.

The previous prime is 725326067. The next prime is 725326109. The reversal of 725326081 is 180623527.

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., 456890625 + 268435456 = 21375^2 + 16384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725326081 is a prime.

It is a super-2 number, since 2×725326081² = 1052195847557637122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725320081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362663040 + 362663041.

It is an arithmetic number, because the mean of its divisors is an integer number (362663041).

Almost surely, 2^725326081 is an apocalyptic number.

It is an amenable number.

725326081 is a deficient number, since it is larger than the sum of its proper divisors (1).

725326081 is an equidigital number, since it uses as much as digits as its factorization.

725326081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 725326081 is about 26931.8785271284. The cubic root of 725326081 is about 898.4855522151.

The spelling of 725326081 in words is "seven hundred twenty-five million, three hundred twenty-six thousand, eighty-one".