1212065 has 4 divisors (see below), whose sum is σ = 1454484. Its totient is φ = 969648.

The previous prime is 1212061. The next prime is 1212103. The reversal of 1212065 is 5602121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 692224 + 519841 = 832^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212065 - 2² = 1212061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121202 + ... + 121211.

It is an arithmetic number, because the mean of its divisors is an integer number (363621).

2^1212065 is an apocalyptic number.

It is an amenable number.

1212065 is a deficient number, since it is larger than the sum of its proper divisors (242419).

1212065 is an equidigital number, since it uses as much as digits as its factorization.

1212065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242418.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1212065 is about 1100.9382362331. The cubic root of 1212065 is about 106.6208081952.

Adding to 1212065 its reverse (5602121), we get a palindrome (6814186).

The spelling of 1212065 in words is "one million, two hundred twelve thousand, sixty-five".