1200427065 has 12 divisors (see below), whose sum is σ = 2080740324. Its totient is φ = 640227744.

The previous prime is 1200427061. The next prime is 1200427079. The reversal of 1200427065 is 5607240021.

It can be written as a sum of positive squares in 2 ways, for example, as 307791936 + 892635129 = 17544^2 + 29877^2 .

It is not a de Polignac number, because 1200427065 - 2² = 1200427061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200427061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13338034 + ... + 13338123.

It is an arithmetic number, because the mean of its divisors is an integer number (173395027).

Almost surely, 2^1200427065 is an apocalyptic number.

1200427065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1200427065 is a deficient number, since it is larger than the sum of its proper divisors (880313259).

1200427065 is a wasteful number, since it uses less digits than its factorization.

1200427065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26676168 (or 26676165 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1200427065 is about 34647.1797553567. The cubic root of 1200427065 is about 1062.7846165314.

Adding to 1200427065 its reverse (5607240021), we get a palindrome (6807667086).

The spelling of 1200427065 in words is "one billion, two hundred million, four hundred twenty-seven thousand, sixty-five".