654465521 has 4 divisors (see below), whose sum is σ = 675577344. Its totient is φ = 633353700.

The previous prime is 654465503. The next prime is 654465527. The reversal of 654465521 is 125564456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 654465521 - 2¹⁸ = 654203377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654465527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10555865 + ... + 10555926.

It is an arithmetic number, because the mean of its divisors is an integer number (168894336).

Almost surely, 2^654465521 is an apocalyptic number.

It is an amenable number.

654465521 is a deficient number, since it is larger than the sum of its proper divisors (21111823).

654465521 is a wasteful number, since it uses less digits than its factorization.

654465521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21111822.

The product of its digits is 144000, while the sum is 38.

The square root of 654465521 is about 25582.5237418047. The cubic root of 654465521 is about 868.2182767926.

The spelling of 654465521 in words is "six hundred fifty-four million, four hundred sixty-five thousand, five hundred twenty-one".