654720265 has 4 divisors (see below), whose sum is σ = 785664324. Its totient is φ = 523776208.

The previous prime is 654720263. The next prime is 654720299. The reversal of 654720265 is 562027456.

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 316270656 + 338449609 = 17784^2 + 18397^2 .

It is a cyclic number.

It is not a de Polignac number, because 654720265 - 2¹ = 654720263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654720263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65472022 + ... + 65472031.

It is an arithmetic number, because the mean of its divisors is an integer number (196416081).

Almost surely, 2^654720265 is an apocalyptic number.

It is an amenable number.

654720265 is a deficient number, since it is larger than the sum of its proper divisors (130944059).

654720265 is a wasteful number, since it uses less digits than its factorization.

654720265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130944058.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 654720265 is about 25587.5021250610. The cubic root of 654720265 is about 868.3309105369.

The spelling of 654720265 in words is "six hundred fifty-four million, seven hundred twenty thousand, two hundred sixty-five".