725102109 has 24 divisors (see below), whose sum is σ = 1089543000. Its totient is φ = 464123520.

The previous prime is 725102107. The next prime is 725102123. The reversal of 725102109 is 901201527.

725102109 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 308025 + 724794084 = 555^2 + 26922^2 .

It is not a de Polignac number, because 725102109 - 2¹ = 725102107 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725102107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39567 + ... + 54915.

It is an arithmetic number, because the mean of its divisors is an integer number (45397625).

Almost surely, 2^725102109 is an apocalyptic number.

It is an amenable number.

725102109 is a deficient number, since it is larger than the sum of its proper divisors (364440891).

725102109 is a wasteful number, since it uses less digits than its factorization.

725102109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565 (or 15562 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 725102109 is about 26927.7200854436. The cubic root of 725102109 is about 898.3930621715.

The spelling of 725102109 in words is "seven hundred twenty-five million, one hundred two thousand, one hundred nine".