120456561 has 8 divisors (see below), whose sum is σ = 169061920. Its totient is φ = 76077792.

The previous prime is 120456533. The next prime is 120456569. The reversal of 120456561 is 165654021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120456561 - 2¹³ = 120448369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120456569) 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, 1056580 + ... + 1056693.

It is an arithmetic number, because the mean of its divisors is an integer number (21132740).

Almost surely, 2^120456561 is an apocalyptic number.

It is an amenable number.

120456561 is a deficient number, since it is larger than the sum of its proper divisors (48605359).

120456561 is a wasteful number, since it uses less digits than its factorization.

120456561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113295.

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

The square root of 120456561 is about 10975.2704294701. The cubic root of 120456561 is about 493.8671655718.

The spelling of 120456561 in words is "one hundred twenty million, four hundred fifty-six thousand, five hundred sixty-one".