64441 has 4 divisors (see below), whose sum is σ = 69412. Its totient is φ = 59472.

The previous prime is 64439. The next prime is 64451. The reversal of 64441 is 14446.

64441 = T₉₃ + T₉₄ + ... + T₁₀₅.

64441 = 179² + 180².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32041 + 32400 = 179^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 64441 - 2¹ = 64439 is a prime.

It is a Duffinian number.

64441 is a lucky number.

It is a nialpdrome in base 10 and base 16.

It is not an unprimeable number, because it can be changed into a prime (64451) 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, 2466 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (17353).

2⁶⁴⁴⁴¹ is an apocalyptic number.

64441 is the 180-th centered square number.

It is an amenable number.

64441 is a deficient number, since it is larger than the sum of its proper divisors (4971).

64441 is a wasteful number, since it uses less digits than its factorization.

64441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970.

The product of its digits is 384, while the sum is 19.

The square root of 64441 is about 253.8523192724. The cubic root of 64441 is about 40.0916647787.

Adding to 64441 its reverse (14446), we get a palindrome (78887).

It can be divided in two parts, 64 and 441, that multiplied together give a square (28224 = 168²).

The spelling of 64441 in words is "sixty-four thousand, four hundred forty-one".