725280405 has 8 divisors (see below), whose sum is σ = 1160448672. Its totient is φ = 386816208.

The previous prime is 725280397. The next prime is 725280419. The reversal of 725280405 is 504082527.

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

It is not a de Polignac number, because 725280405 - 2³ = 725280397 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 24175999 + ... + 24176028.

It is an arithmetic number, because the mean of its divisors is an integer number (145056084).

Almost surely, 2^725280405 is an apocalyptic number.

It is an amenable number.

725280405 is a deficient number, since it is larger than the sum of its proper divisors (435168267).

725280405 is a wasteful number, since it uses less digits than its factorization.

725280405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48352035.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 725280405 is about 26931.0305224290. The cubic root of 725280405 is about 898.4666916922.

The spelling of 725280405 in words is "seven hundred twenty-five million, two hundred eighty thousand, four hundred five".