1200055146 has 16 divisors (see below), whose sum is σ = 2407782144. Its totient is φ = 398739744.

The previous prime is 1200055123. The next prime is 1200055147. The reversal of 1200055146 is 6415500021.

It is not an unprimeable number, because it can be changed into a prime (1200055147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317626 + ... + 321381.

It is an arithmetic number, because the mean of its divisors is an integer number (150486384).

Almost surely, 2^1200055146 is an apocalyptic number.

1200055146 is an abundant number, since it is smaller than the sum of its proper divisors (1207726998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200055146 is a wasteful number, since it uses less digits than its factorization.

1200055146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639325.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1200055146 is about 34641.8121061817. The cubic root of 1200055146 is about 1062.6748470914.

Adding to 1200055146 its reverse (6415500021), we get a palindrome (7615555167).

The spelling of 1200055146 in words is "one billion, two hundred million, fifty-five thousand, one hundred forty-six".