652646257 has 8 divisors (see below), whose sum is σ = 689169600. Its totient is φ = 616340304.

The previous prime is 652646249. The next prime is 652646273. The reversal of 652646257 is 752646256.

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 652646257 - 2³ = 652646249 is a prime.

It is a super-2 number, since 2×652646257² = 851894273552220098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (652646237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48157 + ... + 60202.

It is an arithmetic number, because the mean of its divisors is an integer number (86146200).

Almost surely, 2^652646257 is an apocalyptic number.

It is an amenable number.

652646257 is a deficient number, since it is larger than the sum of its proper divisors (36523343).

652646257 is a wasteful number, since it uses less digits than its factorization.

652646257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108695.

The product of its digits is 604800, while the sum is 43.

The square root of 652646257 is about 25546.9422240706. The cubic root of 652646257 is about 867.4130476731.

Subtracting 652646257 from its reverse (752646256), we obtain a palindrome (99999999).

The spelling of 652646257 in words is "six hundred fifty-two million, six hundred forty-six thousand, two hundred fifty-seven".