64521141 has 12 divisors (see below), whose sum is σ = 89861472. Its totient is φ = 41101368.

The previous prime is 64521139. The next prime is 64521151. The reversal of 64521141 is 14112546.

It is a happy number.

It is not a de Polignac number, because 64521141 - 2¹ = 64521139 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64521101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66240 + ... + 67206.

It is an arithmetic number, because the mean of its divisors is an integer number (7488456).

Almost surely, 2^64521141 is an apocalyptic number.

It is an amenable number.

64521141 is a deficient number, since it is larger than the sum of its proper divisors (25340331).

64521141 is an frugal number, since it uses more digits than its factorization.

64521141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 993 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 64521141 is about 8032.5052754418. The cubic root of 64521141 is about 401.0827767582.

Adding to 64521141 its reverse (14112546), we get a palindrome (78633687).

The spelling of 64521141 in words is "sixty-four million, five hundred twenty-one thousand, one hundred forty-one".