652421217 has 16 divisors (see below), whose sum is σ = 994867200. Its totient is φ = 372549072.

The previous prime is 652421179. The next prime is 652421219. The reversal of 652421217 is 712124256.

It is not a de Polignac number, because 652421217 - 2⁷ = 652421089 is a prime.

It is a super-2 number, since 2×652421217² = 851306888783522178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (652421219) 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 15 ways as a sum of consecutive naturals, for example, 21784 + ... + 42182.

It is an arithmetic number, because the mean of its divisors is an integer number (62179200).

Almost surely, 2^652421217 is an apocalyptic number.

It is an amenable number.

652421217 is a deficient number, since it is larger than the sum of its proper divisors (342445983).

652421217 is a wasteful number, since it uses less digits than its factorization.

652421217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21932.

The product of its digits is 6720, while the sum is 30.

The square root of 652421217 is about 25542.5374033200. The cubic root of 652421217 is about 867.3133381850.

The spelling of 652421217 in words is "six hundred fifty-two million, four hundred twenty-one thousand, two hundred seventeen".