1213065 has 24 divisors (see below), whose sum is σ = 2403648. Its totient is φ = 554400.

The previous prime is 1213063. The next prime is 1213081. The reversal of 1213065 is 5603121.

It is not a de Polignac number, because 1213065 - 2¹ = 1213063 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1611 + ... + 2240.

It is an arithmetic number, because the mean of its divisors is an integer number (100152).

2^1213065 is an apocalyptic number.

1213065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213065 is a deficient number, since it is larger than the sum of its proper divisors (1190583).

1213065 is a wasteful number, since it uses less digits than its factorization.

1213065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869 (or 3866 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1213065 is about 1101.3923006813. The cubic root of 1213065 is about 106.6501222170.

Adding to 1213065 its reverse (5603121), we get a palindrome (6816186).

The spelling of 1213065 in words is "one million, two hundred thirteen thousand, sixty-five".