1222556560 has 20 divisors (see below), whose sum is σ = 2842444188. Its totient is φ = 489022592.

The previous prime is 1222556557. The next prime is 1222556603. The reversal of 1222556560 is 656552221.

It can be written as a sum of positive squares in 2 ways, for example, as 241864704 + 980691856 = 15552^2 + 31316^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 7640899 + ... + 7641058.

Almost surely, 2^1222556560 is an apocalyptic number.

1222556560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222556560 is an abundant number, since it is smaller than the sum of its proper divisors (1619887628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222556560 is a wasteful number, since it uses less digits than its factorization.

1222556560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15281970 (or 15281964 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1222556560 is about 34965.0762904931. The cubic root of 1222556560 is about 1069.2755920104.

The spelling of 1222556560 in words is "one billion, two hundred twenty-two million, five hundred fifty-six thousand, five hundred sixty".