64821241 has 4 divisors (see below), whose sum is σ = 64838272. Its totient is φ = 64804212.

The previous prime is 64821233. The next prime is 64821271. The reversal of 64821241 is 14212846.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14212846 = 2 ⋅7106423.

It is a cyclic number.

It is not a de Polignac number, because 64821241 - 2³ = 64821233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64821271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100 + ... + 11386.

It is an arithmetic number, because the mean of its divisors is an integer number (16209568).

Almost surely, 2^64821241 is an apocalyptic number.

It is an amenable number.

64821241 is a deficient number, since it is larger than the sum of its proper divisors (17031).

64821241 is a wasteful number, since it uses less digits than its factorization.

64821241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17030.

The product of its digits is 3072, while the sum is 28.

The square root of 64821241 is about 8051.1639531188. The cubic root of 64821241 is about 401.7036523700.

The spelling of 64821241 in words is "sixty-four million, eight hundred twenty-one thousand, two hundred forty-one".