725320105 has 8 divisors (see below), whose sum is σ = 886806792. Its totient is φ = 569307648.

The previous prime is 725320103. The next prime is 725320153. The reversal of 725320105 is 501023527.

725320105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23970816 + 701349289 = 4896^2 + 26483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 725320105 - 2¹ = 725320103 is a prime.

It is a super-2 number, since 2×725320105² = 1052178509434422050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725320105.

It is not an unprimeable number, because it can be changed into a prime (725320103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1368264 + ... + 1368793.

It is an arithmetic number, because the mean of its divisors is an integer number (110850849).

Almost surely, 2^725320105 is an apocalyptic number.

It is an amenable number.

725320105 is a deficient number, since it is larger than the sum of its proper divisors (161486687).

725320105 is a wasteful number, since it uses less digits than its factorization.

725320105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737115.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 725320105 is about 26931.7675803130. The cubic root of 725320105 is about 898.4830846517.

The spelling of 725320105 in words is "seven hundred twenty-five million, three hundred twenty thousand, one hundred five".