725594281 has 2 divisors, whose sum is σ = 725594282. Its totient is φ = 725594280.

The previous prime is 725594273. The next prime is 725594291. The reversal of 725594281 is 182495527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660952681 + 64641600 = 25709^2 + 8040^2 .

It is a cyclic number.

It is not a de Polignac number, because 725594281 - 2³ = 725594273 is a prime.

It is a super-2 number, since 2×725594281² = 1052974121239813922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725594251) 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, 362797140 + 362797141.

It is an arithmetic number, because the mean of its divisors is an integer number (362797141).

Almost surely, 2^725594281 is an apocalyptic number.

It is an amenable number.

725594281 is a deficient number, since it is larger than the sum of its proper divisors (1).

725594281 is an equidigital number, since it uses as much as digits as its factorization.

725594281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 725594281 is about 26936.8572962772. The cubic root of 725594281 is about 898.5962813232.

The spelling of 725594281 in words is "seven hundred twenty-five million, five hundred ninety-four thousand, two hundred eighty-one".