120326561 has 4 divisors (see below), whose sum is σ = 127404612. Its totient is φ = 113248512.

The previous prime is 120326551. The next prime is 120326567. The reversal of 120326561 is 165623021.

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 62094400 + 58232161 = 7880^2 + 7631^2 .

It is a cyclic number.

It is not a de Polignac number, because 120326561 - 2²² = 116132257 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 120326561.

It is not an unprimeable number, because it can be changed into a prime (120326567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3539000 + ... + 3539033.

It is an arithmetic number, because the mean of its divisors is an integer number (31851153).

Almost surely, 2^120326561 is an apocalyptic number.

It is an amenable number.

120326561 is a deficient number, since it is larger than the sum of its proper divisors (7078051).

120326561 is an equidigital number, since it uses as much as digits as its factorization.

120326561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078050.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 120326561 is about 10969.3464253801. The cubic root of 120326561 is about 493.6894366564.

Adding to 120326561 its reverse (165623021), we get a palindrome (285949582).

The spelling of 120326561 in words is "one hundred twenty million, three hundred twenty-six thousand, five hundred sixty-one".