120195661 has 4 divisors (see below), whose sum is σ = 127266012. Its totient is φ = 113125312.

The previous prime is 120195643. The next prime is 120195671. The reversal of 120195661 is 166591021.

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 46321636 + 73874025 = 6806^2 + 8595^2 .

It is a cyclic number.

It is not a de Polignac number, because 120195661 - 2⁵ = 120195629 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120195601) 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, 3535150 + ... + 3535183.

It is an arithmetic number, because the mean of its divisors is an integer number (31816503).

Almost surely, 2^120195661 is an apocalyptic number.

It is an amenable number.

120195661 is a deficient number, since it is larger than the sum of its proper divisors (7070351).

120195661 is an equidigital number, since it uses as much as digits as its factorization.

120195661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070350.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 120195661 is about 10963.3781746321. The cubic root of 120195661 is about 493.5103479191.

The spelling of 120195661 in words is "one hundred twenty million, one hundred ninety-five thousand, six hundred sixty-one".