725008105 has 4 divisors (see below), whose sum is σ = 870009732. Its totient is φ = 580006480.

The previous prime is 725008087. The next prime is 725008127. The reversal of 725008105 is 501800527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 418898089 + 306110016 = 20467^2 + 17496^2 .

It is not a de Polignac number, because 725008105 - 2⁷ = 725007977 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 3 ways as a sum of consecutive naturals, for example, 72500806 + ... + 72500815.

It is an arithmetic number, because the mean of its divisors is an integer number (217502433).

Almost surely, 2^725008105 is an apocalyptic number.

It is an amenable number.

725008105 is a deficient number, since it is larger than the sum of its proper divisors (145001627).

725008105 is a wasteful number, since it uses less digits than its factorization.

725008105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145001626.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 725008105 is about 26925.9745413235. The cubic root of 725008105 is about 898.3542372068.

The spelling of 725008105 in words is "seven hundred twenty-five million, eight thousand, one hundred five".