725465557 has 4 divisors (see below), whose sum is σ = 729473836. Its totient is φ = 721457280.

The previous prime is 725465519. The next prime is 725465561. The reversal of 725465557 is 755564527.

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 377680356 + 347785201 = 19434^2 + 18649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725465557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725469557) by changing a digit.

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, 2003868 + ... + 2004229.

It is an arithmetic number, because the mean of its divisors is an integer number (182368459).

Almost surely, 2^725465557 is an apocalyptic number.

It is an amenable number.

725465557 is a deficient number, since it is larger than the sum of its proper divisors (4008279).

725465557 is a wasteful number, since it uses less digits than its factorization.

725465557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008278.

The product of its digits is 1470000, while the sum is 46.

The square root of 725465557 is about 26934.4678247037. The cubic root of 725465557 is about 898.5431397115.

The spelling of 725465557 in words is "seven hundred twenty-five million, four hundred sixty-five thousand, five hundred fifty-seven".