120860209 has 4 divisors (see below), whose sum is σ = 121048816. Its totient is φ = 120671604.

The previous prime is 120860203. The next prime is 120860213. The reversal of 120860209 is 902068021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902068021 = 7069 ⋅127609.

It is a cyclic number.

It is not a de Polignac number, because 120860209 - 2¹⁷ = 120729137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120860203) 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 3 ways as a sum of consecutive naturals, for example, 93339 + ... + 94624.

It is an arithmetic number, because the mean of its divisors is an integer number (30262204).

Almost surely, 2^120860209 is an apocalyptic number.

It is an amenable number.

120860209 is a deficient number, since it is larger than the sum of its proper divisors (188607).

120860209 is an equidigital number, since it uses as much as digits as its factorization.

120860209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188606.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 120860209 is about 10993.6440273460. The cubic root of 120860209 is about 494.4181975079.

The spelling of 120860209 in words is "one hundred twenty million, eight hundred sixty thousand, two hundred nine".