652145521 has 8 divisors (see below), whose sum is σ = 656720064. Its totient is φ = 647579280.

The previous prime is 652145503. The next prime is 652145563. The reversal of 652145521 is 125541256.

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

It is a cyclic number.

It is not a de Polignac number, because 652145521 - 2⁵ = 652145489 is a prime.

It is a super-2 number, since 2×652145521² = 850587561120722882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (652145581) 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 7 ways as a sum of consecutive naturals, for example, 289626 + ... + 291868.

It is an arithmetic number, because the mean of its divisors is an integer number (82090008).

Almost surely, 2^652145521 is an apocalyptic number.

It is an amenable number.

652145521 is a deficient number, since it is larger than the sum of its proper divisors (4574543).

652145521 is a wasteful number, since it uses less digits than its factorization.

652145521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its digits is 12000, while the sum is 31.

The square root of 652145521 is about 25537.1400317263. The cubic root of 652145521 is about 867.1911530583.

Adding to 652145521 its reverse (125541256), we get a palindrome (777686777).

The spelling of 652145521 in words is "six hundred fifty-two million, one hundred forty-five thousand, five hundred twenty-one".