1200129 has 8 divisors (see below), whose sum is σ = 1828800. Its totient is φ = 685776.

The previous prime is 1200109. The next prime is 1200139. The reversal of 1200129 is 9210021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200129 - 2⁹ = 1199617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1200109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28554 + ... + 28595.

It is an arithmetic number, because the mean of its divisors is an integer number (228600).

It is a Proth number, since it is equal to 293 ⋅ 2¹² + 1 and 293 < 2¹².

2^1200129 is an apocalyptic number.

It is an amenable number.

1200129 is a deficient number, since it is larger than the sum of its proper divisors (628671).

1200129 is an equidigital number, since it uses as much as digits as its factorization.

1200129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57159.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1200129 is about 1095.5039936029. The cubic root of 1200129 is about 106.2696646417.

It can be divided in two parts, 120012 and 9, that added together give a palindrome (120021).

The spelling of 1200129 in words is "one million, two hundred thousand, one hundred twenty-nine".