1222164605 has 4 divisors (see below), whose sum is σ = 1466597532. Its totient is φ = 977731680.

The previous prime is 1222164599. The next prime is 1222164611. The reversal of 1222164605 is 5064612221.

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

It is an interprime number because it is at equal distance from previous prime (1222164599) and next prime (1222164611).

It can be written as a sum of positive squares in 2 ways, for example, as 227014489 + 995150116 = 15067^2 + 31546^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1222164605 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122216456 + ... + 122216465.

It is an arithmetic number, because the mean of its divisors is an integer number (366649383).

Almost surely, 2^1222164605 is an apocalyptic number.

It is an amenable number.

1222164605 is a deficient number, since it is larger than the sum of its proper divisors (244432927).

1222164605 is an equidigital number, since it uses as much as digits as its factorization.

1222164605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244432926.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1222164605 is about 34959.4708913050. The cubic root of 1222164605 is about 1069.1613088966.

Adding to 1222164605 its reverse (5064612221), we get a palindrome (6286776826).

The spelling of 1222164605 in words is "one billion, two hundred twenty-two million, one hundred sixty-four thousand, six hundred five".