120000005 has 4 divisors (see below), whose sum is σ = 144000012. Its totient is φ = 96000000.

The previous prime is 119999987. The next prime is 120000007. The reversal of 120000005 is 500000021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500000021 = 1879 ⋅266099.

It can be written as a sum of positive squares in 2 ways, for example, as 83795716 + 36204289 = 9154^2 + 6017^2 .

It is not a de Polignac number, because 120000005 - 2¹⁸ = 119737861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 119999947 and 120000001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000007) 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, 11999996 + ... + 12000005.

It is an arithmetic number, because the mean of its divisors is an integer number (36000003).

Almost surely, 2^120000005 is an apocalyptic number.

It is an amenable number.

120000005 is a deficient number, since it is larger than the sum of its proper divisors (24000007).

120000005 is an equidigital number, since it uses as much as digits as its factorization.

120000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24000006.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 120000005 is about 10954.4513783211. The cubic root of 120000005 is about 493.2424217167.

Adding to 120000005 its reverse (500000021), we get a palindrome (620000026).

The spelling of 120000005 in words is "one hundred twenty million, five", and thus it is an aban number.