652891 has 4 divisors (see below), whose sum is σ = 673984. Its totient is φ = 631800.

The previous prime is 652871. The next prime is 652903. The reversal of 652891 is 198256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 652891 - 2¹⁷ = 521819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 21061 = 652891 / (6 + 5 + 2 + 8 + 9 + 1).

It is a d-powerful number, because it can be written as 6² + 5⁸ + 8⁶ + 2² + 9² + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (652811) 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, 10500 + ... + 10561.

It is an arithmetic number, because the mean of its divisors is an integer number (168496).

2⁶⁵²⁸⁹¹ is an apocalyptic number.

652891 is a deficient number, since it is larger than the sum of its proper divisors (21093).

652891 is a wasteful number, since it uses less digits than its factorization.

652891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21092.

The product of its digits is 4320, while the sum is 31.

The square root of 652891 is about 808.0167077481. The cubic root of 652891 is about 86.7521461043.

The spelling of 652891 in words is "six hundred fifty-two thousand, eight hundred ninety-one".