1220012065 has 8 divisors (see below), whose sum is σ = 1465360488. Its totient is φ = 975112320.

The previous prime is 1220012051. The next prime is 1220012083. The reversal of 1220012065 is 5602100221.

It can be written as a sum of positive squares in 4 ways, for example, as 281937681 + 938074384 = 16791^2 + 30628^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220012065 - 2²⁵ = 1186457633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106156 + ... + 117085.

It is an arithmetic number, because the mean of its divisors is an integer number (183170061).

Almost surely, 2^1220012065 is an apocalyptic number.

It is an amenable number.

1220012065 is a deficient number, since it is larger than the sum of its proper divisors (245348423).

1220012065 is a wasteful number, since it uses less digits than its factorization.

1220012065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224339.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220012065 is about 34928.6711026916. The cubic root of 1220012065 is about 1068.5332524901.

Adding to 1220012065 its reverse (5602100221), we get a palindrome (6822112286).

The spelling of 1220012065 in words is "one billion, two hundred twenty million, twelve thousand, sixty-five".