120510661 has 4 divisors (see below), whose sum is σ = 120533292. Its totient is φ = 120488032.

The previous prime is 120510659. The next prime is 120510667. The reversal of 120510661 is 166015021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17589636 + 102921025 = 4194^2 + 10145^2 .

It is a cyclic number.

It is not a de Polignac number, because 120510661 - 2¹ = 120510659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120510667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545 + ... + 15601.

It is an arithmetic number, because the mean of its divisors is an integer number (30133323).

Almost surely, 2^120510661 is an apocalyptic number.

It is an amenable number.

120510661 is a deficient number, since it is larger than the sum of its proper divisors (22631).

120510661 is an equidigital number, since it uses as much as digits as its factorization.

120510661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22630.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 120510661 is about 10977.7347845537. The cubic root of 120510661 is about 493.9410904637.

Adding to 120510661 its reverse (166015021), we get a palindrome (286525682).

The spelling of 120510661 in words is "one hundred twenty million, five hundred ten thousand, six hundred sixty-one".