120001005 has 54 divisors (see below), whose sum is σ = 220544142. Its totient is φ = 60355680.

The previous prime is 120001001. The next prime is 120001019. The reversal of 120001005 is 500100021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 96000804 + 24000201 = 9798^2 + 4899^2 .

It is not a de Polignac number, because 120001005 - 2² = 120001001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001001) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1690120 + ... + 1690190.

Almost surely, 2^120001005 is an apocalyptic number.

120001005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120001005 is a deficient number, since it is larger than the sum of its proper divisors (100543137).

120001005 is an equidigital number, since it uses as much as digits as its factorization.

120001005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 120001005 is about 10954.4970217715. The cubic root of 120001005 is about 493.2437918307.

Adding to 120001005 its reverse (500100021), we get a palindrome (620101026).

The spelling of 120001005 in words is "one hundred twenty million, one thousand, five".