64827121 has 4 divisors (see below), whose sum is σ = 64850032. Its totient is φ = 64804212.

The previous prime is 64827089. The next prime is 64827131. The reversal of 64827121 is 12172846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64827121 - 2⁵ = 64827089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64827131) 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 3 ways as a sum of consecutive naturals, for example, 6495 + ... + 13108.

It is an arithmetic number, because the mean of its divisors is an integer number (16212508).

Almost surely, 2^64827121 is an apocalyptic number.

It is an amenable number.

64827121 is a deficient number, since it is larger than the sum of its proper divisors (22911).

64827121 is a wasteful number, since it uses less digits than its factorization.

64827121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22910.

The product of its digits is 5376, while the sum is 31.

The square root of 64827121 is about 8051.5291094301. The cubic root of 64827121 is about 401.7157983169.

Adding to 64827121 its reverse (12172846), we get a palindrome (76999967).

The spelling of 64827121 in words is "sixty-four million, eight hundred twenty-seven thousand, one hundred twenty-one".