61208641 has 4 divisors (see below), whose sum is σ = 65917012. Its totient is φ = 56500272.

The previous prime is 61208639. The next prime is 61208657. The reversal of 61208641 is 14680216.

61208641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 33593616 + 27615025 = 5796^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 61208641 - 2¹ = 61208639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61208621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2354166 + ... + 2354191.

It is an arithmetic number, because the mean of its divisors is an integer number (16479253).

Almost surely, 2^61208641 is an apocalyptic number.

It is an amenable number.

61208641 is a deficient number, since it is larger than the sum of its proper divisors (4708371).

61208641 is a wasteful number, since it uses less digits than its factorization.

61208641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708370.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 61208641 is about 7823.5951454558. The cubic root of 61208641 is about 394.0980134419.

Adding to 61208641 its reverse (14680216), we get a palindrome (75888857).

The spelling of 61208641 in words is "sixty-one million, two hundred eight thousand, six hundred forty-one".