725081305 has 16 divisors (see below), whose sum is σ = 946696464. Its totient is φ = 529920000.

The previous prime is 725081293. The next prime is 725081339. The reversal of 725081305 is 503180527.

It can be written as a sum of positive squares in 8 ways, for example, as 105021504 + 620059801 = 10248^2 + 24901^2 .

It is not a de Polignac number, because 725081305 - 2⁷ = 725081177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51196 + ... + 63805.

It is an arithmetic number, because the mean of its divisors is an integer number (59168529).

Almost surely, 2^725081305 is an apocalyptic number.

It is an amenable number.

725081305 is a deficient number, since it is larger than the sum of its proper divisors (221615159).

725081305 is a wasteful number, since it uses less digits than its factorization.

725081305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115116.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 725081305 is about 26927.3337892930. Note that the first 3 decimals coincide. The cubic root of 725081305 is about 898.3844701181.

The spelling of 725081305 in words is "seven hundred twenty-five million, eighty-one thousand, three hundred five".