1222578845 has 18 divisors (see below), whose sum is σ = 1550257758. Its totient is φ = 925460208.

The previous prime is 1222578811. The next prime is 1222578857. The reversal of 1222578845 is 5488752221.

It can be written as a sum of positive squares in only one way, i.e., 978063076 + 244515769 = 31274^2 + 15637^2 .

It is not a de Polignac number, because 1222578845 - 2¹⁴ = 1222562461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222578796 and 1222578805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1485104 + ... + 1485926.

It is an arithmetic number, because the mean of its divisors is an integer number (86125431).

Almost surely, 2^1222578845 is an apocalyptic number.

It is an amenable number.

1222578845 is a deficient number, since it is larger than the sum of its proper divisors (327678913).

1222578845 is an frugal number, since it uses more digits than its factorization.

1222578845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 847 counting only the distinct ones).

The product of its digits is 358400, while the sum is 44.

The square root of 1222578845 is about 34965.3949641642. The cubic root of 1222578845 is about 1069.2820889592.

The spelling of 1222578845 in words is "one billion, two hundred twenty-two million, five hundred seventy-eight thousand, eight hundred forty-five".