64852921 has 6 divisors (see below), whose sum is σ = 75441210. Its totient is φ = 55588176.

The previous prime is 64852877. The next prime is 64852933. The reversal of 64852921 is 12925846.

It can be written as a sum of positive squares in only one way, i.e., 64577296 + 275625 = 8036^2 + 525^2 .

It is not a de Polignac number, because 64852921 - 2⁷ = 64852793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64852951) 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 5 ways as a sum of consecutive naturals, for example, 661716 + ... + 661813.

It is an arithmetic number, because the mean of its divisors is an integer number (12573535).

Almost surely, 2^64852921 is an apocalyptic number.

It is an amenable number.

64852921 is a deficient number, since it is larger than the sum of its proper divisors (10588289).

64852921 is a wasteful number, since it uses less digits than its factorization.

64852921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323543 (or 1323536 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 64852921 is about 8053.1311301878. The cubic root of 64852921 is about 401.7690830780.

The spelling of 64852921 in words is "sixty-four million, eight hundred fifty-two thousand, nine hundred twenty-one".