1200447129 has 48 divisors (see below), whose sum is σ = 2024880768. Its totient is φ = 628121088.

The previous prime is 1200447097. The next prime is 1200447221. The reversal of 1200447129 is 9217440021.

It is not a de Polignac number, because 1200447129 - 2⁵ = 1200447097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200447096 and 1200447105.

It is not an unprimeable number, because it can be changed into a prime (1200443129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85972 + ... + 98954.

It is an arithmetic number, because the mean of its divisors is an integer number (42185016).

Almost surely, 2^1200447129 is an apocalyptic number.

It is an amenable number.

1200447129 is a deficient number, since it is larger than the sum of its proper divisors (824433639).

1200447129 is a wasteful number, since it uses less digits than its factorization.

1200447129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13054 (or 13047 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1200447129 is about 34647.4693015233. The cubic root of 1200447129 is about 1062.7905376441.

The spelling of 1200447129 in words is "one billion, two hundred million, four hundred forty-seven thousand, one hundred twenty-nine".