65561142 has 16 divisors (see below), whose sum is σ = 131208192. Its totient is φ = 21839400.

The previous prime is 65561137. The next prime is 65561143. The reversal of 65561142 is 24116556.

65561142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65561143) 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 7 ways as a sum of consecutive naturals, for example, 10767 + ... + 15717.

It is an arithmetic number, because the mean of its divisors is an integer number (8200512).

Almost surely, 2^65561142 is an apocalyptic number.

65561142 is an abundant number, since it is smaller than the sum of its proper divisors (65647050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65561142 is a wasteful number, since it uses less digits than its factorization.

65561142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163.

The product of its digits is 7200, while the sum is 30.

The square root of 65561142 is about 8096.9835123952. The cubic root of 65561142 is about 403.2262868861.

Adding to 65561142 its reverse (24116556), we get a palindrome (89677698).

It can be divided in two parts, 65561 and 142, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 65561142 in words is "sixty-five million, five hundred sixty-one thousand, one hundred forty-two".