120049561 has 2 divisors, whose sum is σ = 120049562. Its totient is φ = 120049560.

The previous prime is 120049537. The next prime is 120049591. The reversal of 120049561 is 165940021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120033936 + 15625 = 10956^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 120049561 - 2²³ = 111660953 is a prime.

It is equal to p_6844330 and since 120049561 and 6844330 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (120049511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60024780 + 60024781.

It is an arithmetic number, because the mean of its divisors is an integer number (60024781).

Almost surely, 2^120049561 is an apocalyptic number.

It is an amenable number.

120049561 is a deficient number, since it is larger than the sum of its proper divisors (1).

120049561 is an equidigital number, since it uses as much as digits as its factorization.

120049561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 120049561 is about 10956.7130563869. The cubic root of 120049561 is about 493.3103099291.

Adding to 120049561 its reverse (165940021), we get a palindrome (285989582).

The spelling of 120049561 in words is "one hundred twenty million, forty-nine thousand, five hundred sixty-one".