725505247 has 4 divisors (see below), whose sum is σ = 725559120. Its totient is φ = 725451376.

The previous prime is 725505239. The next prime is 725505251. The reversal of 725505247 is 742505527.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 725505247 - 2³ = 725505239 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 (725505227) 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, 13158 + ... + 40300.

It is an arithmetic number, because the mean of its divisors is an integer number (181389780).

Almost surely, 2^725505247 is an apocalyptic number.

725505247 is a deficient number, since it is larger than the sum of its proper divisors (53873).

725505247 is a wasteful number, since it uses less digits than its factorization.

725505247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53872.

The product of its (nonzero) digits is 98000, while the sum is 37.

The square root of 725505247 is about 26935.2046028984. The cubic root of 725505247 is about 898.5595257533.

The spelling of 725505247 in words is "seven hundred twenty-five million, five hundred five thousand, two hundred forty-seven".