52120561 has 2 divisors, whose sum is σ = 52120562. Its totient is φ = 52120560.

The previous prime is 52120559. The next prime is 52120567. The reversal of 52120561 is 16502125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45643536 + 6477025 = 6756^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 52120561 - 2¹ = 52120559 is a prime.

Together with 52120559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (52120567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26060280 + 26060281.

It is an arithmetic number, because the mean of its divisors is an integer number (26060281).

Almost surely, 2^52120561 is an apocalyptic number.

It is an amenable number.

52120561 is a deficient number, since it is larger than the sum of its proper divisors (1).

52120561 is an equidigital number, since it uses as much as digits as its factorization.

52120561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 52120561 is about 7219.4571125535. The cubic root of 52120561 is about 373.5393515512.

Adding to 52120561 its reverse (16502125), we get a palindrome (68622686).

The spelling of 52120561 in words is "fifty-two million, one hundred twenty thousand, five hundred sixty-one".