1206102665 has 4 divisors (see below), whose sum is σ = 1447323204. Its totient is φ = 964882128.

The previous prime is 1206102661. The next prime is 1206102671. The reversal of 1206102665 is 5662016021.

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 342213001 + 863889664 = 18499^2 + 29392^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206102665 - 2² = 1206102661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1206102661) 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, 120610262 + ... + 120610271.

It is an arithmetic number, because the mean of its divisors is an integer number (361830801).

Almost surely, 2^1206102665 is an apocalyptic number.

It is an amenable number.

1206102665 is a deficient number, since it is larger than the sum of its proper divisors (241220539).

1206102665 is an equidigital number, since it uses as much as digits as its factorization.

1206102665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241220538.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1206102665 is about 34728.9888277790. The cubic root of 1206102665 is about 1064.4569266424.

Adding to 1206102665 its reverse (5662016021), we get a palindrome (6868118686).

The spelling of 1206102665 in words is "one billion, two hundred six million, one hundred two thousand, six hundred sixty-five".