1200129455 has 16 divisors (see below), whose sum is σ = 1650792000. Its totient is φ = 820495872.

The previous prime is 1200129439. The next prime is 1200129481. The reversal of 1200129455 is 5549210021.

It is not a de Polignac number, because 1200129455 - 2⁴ = 1200129439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39080 + ... + 62669.

It is an arithmetic number, because the mean of its divisors is an integer number (103174500).

Almost surely, 2^1200129455 is an apocalyptic number.

1200129455 is a deficient number, since it is larger than the sum of its proper divisors (450662545).

1200129455 is a wasteful number, since it uses less digits than its factorization.

1200129455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102098.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1200129455 is about 34642.8846229641. The cubic root of 1200129455 is about 1062.6967807155.

Adding to 1200129455 its reverse (5549210021), we get a palindrome (6749339476).

The spelling of 1200129455 in words is "one billion, two hundred million, one hundred twenty-nine thousand, four hundred fifty-five".