64540241 has 4 divisors (see below), whose sum is σ = 64559412. Its totient is φ = 64521072.

The previous prime is 64540213. The next prime is 64540243. The reversal of 64540241 is 14204546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14204546 = 2 ⋅7102273.

It can be written as a sum of positive squares in 2 ways, for example, as 49056016 + 15484225 = 7004^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 64540241 - 2¹⁰ = 64539217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64540241.

It is not an unprimeable number, because it can be changed into a prime (64540243) 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, 3050 + ... + 11763.

It is an arithmetic number, because the mean of its divisors is an integer number (16139853).

Almost surely, 2^64540241 is an apocalyptic number.

It is an amenable number.

64540241 is a deficient number, since it is larger than the sum of its proper divisors (19171).

64540241 is a wasteful number, since it uses less digits than its factorization.

64540241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19170.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 64540241 is about 8033.6941066984. The cubic root of 64540241 is about 401.1223499643.

Adding to 64540241 its reverse (14204546), we get a palindrome (78744787).

The spelling of 64540241 in words is "sixty-four million, five hundred forty thousand, two hundred forty-one".