1222505345 has 8 divisors (see below), whose sum is σ = 1506655464. Its totient is φ = 951571584.

The previous prime is 1222505327. The next prime is 1222505359. The reversal of 1222505345 is 5435052221.

It can be written as a sum of positive squares in 4 ways, for example, as 409171984 + 813333361 = 20228^2 + 28519^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1222505345 - 2²² = 1218311041 is a prime.

It is a Duffinian number.

It is a Curzon 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, 3303884 + ... + 3304253.

It is an arithmetic number, because the mean of its divisors is an integer number (188331933).

Almost surely, 2^1222505345 is an apocalyptic number.

It is an amenable number.

1222505345 is a deficient number, since it is larger than the sum of its proper divisors (284150119).

1222505345 is an equidigital number, since it uses as much as digits as its factorization.

1222505345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608179.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1222505345 is about 34964.3439091884. The cubic root of 1222505345 is about 1069.2606605365.

Adding to 1222505345 its reverse (5435052221), we get a palindrome (6657557566).

The spelling of 1222505345 in words is "one billion, two hundred twenty-two million, five hundred five thousand, three hundred forty-five".