1200219985 has 4 divisors (see below), whose sum is σ = 1440263988. Its totient is φ = 960175984.

The previous prime is 1200219983. The next prime is 1200219989. The reversal of 1200219985 is 5899120021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5899120021 = 4861 ⋅1213561.

It can be written as a sum of positive squares in 2 ways, for example, as 401761936 + 798458049 = 20044^2 + 28257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200219985 - 2¹ = 1200219983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200219983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120021994 + ... + 120022003.

It is an arithmetic number, because the mean of its divisors is an integer number (360065997).

Almost surely, 2^1200219985 is an apocalyptic number.

It is an amenable number.

1200219985 is a deficient number, since it is larger than the sum of its proper divisors (240044003).

1200219985 is an equidigital number, since it uses as much as digits as its factorization.

1200219985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240044002.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 1200219985 is about 34644.1912158445. The cubic root of 1200219985 is about 1062.7235010331.

The spelling of 1200219985 in words is "one billion, two hundred million, two hundred nineteen thousand, nine hundred eighty-five".