120561523 has 4 divisors (see below), whose sum is σ = 120583728. Its totient is φ = 120539320.

The previous prime is 120561491. The next prime is 120561557. The reversal of 120561523 is 325165021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120561523 - 2⁵ = 120561491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120561583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3090 + ... + 15832.

It is an arithmetic number, because the mean of its divisors is an integer number (30145932).

Almost surely, 2^120561523 is an apocalyptic number.

120561523 is a deficient number, since it is larger than the sum of its proper divisors (22205).

120561523 is an equidigital number, since it uses as much as digits as its factorization.

120561523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22204.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 120561523 is about 10980.0511383144. The cubic root of 120561523 is about 494.0105706185.

The spelling of 120561523 in words is "one hundred twenty million, five hundred sixty-one thousand, five hundred twenty-three".