64241621 has 4 divisors (see below), whose sum is σ = 65608512. Its totient is φ = 62874732.

The previous prime is 64241609. The next prime is 64241633. The reversal of 64241621 is 12614246.

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 an interprime number because it is at equal distance from previous prime (64241609) and next prime (64241633).

It is a cyclic number.

It is not a de Polignac number, because 64241621 - 2⁶ = 64241557 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64247621) 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, 683375 + ... + 683468.

It is an arithmetic number, because the mean of its divisors is an integer number (16402128).

Almost surely, 2^64241621 is an apocalyptic number.

It is an amenable number.

64241621 is a deficient number, since it is larger than the sum of its proper divisors (1366891).

64241621 is a wasteful number, since it uses less digits than its factorization.

64241621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366890.

The product of its digits is 2304, while the sum is 26.

The square root of 64241621 is about 8015.0870862393. The cubic root of 64241621 is about 400.5027449374.

Adding to 64241621 its reverse (12614246), we get a palindrome (76855867).

The spelling of 64241621 in words is "sixty-four million, two hundred forty-one thousand, six hundred twenty-one".