120511661 has 8 divisors (see below), whose sum is σ = 128935200. Its totient is φ = 112296240.

The previous prime is 120511649. The next prime is 120511667. The reversal of 120511661 is 166115021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120511661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120511667) 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 in 7 ways as a sum of consecutive naturals, for example, 50831 + ... + 53148.

It is an arithmetic number, because the mean of its divisors is an integer number (16116900).

Almost surely, 2^120511661 is an apocalyptic number.

It is an amenable number.

120511661 is a deficient number, since it is larger than the sum of its proper divisors (8423539).

120511661 is a wasteful number, since it uses less digits than its factorization.

120511661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104059.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 120511661 is about 10977.7803311963. The cubic root of 120511661 is about 493.9424567044.

Adding to 120511661 its reverse (166115021), we get a palindrome (286626682).

The spelling of 120511661 in words is "one hundred twenty million, five hundred eleven thousand, six hundred sixty-one".