1225565650 has 12 divisors (see below), whose sum is σ = 2279552202. Its totient is φ = 490226240.

The previous prime is 1225565639. The next prime is 1225565669. The reversal of 1225565650 is 565655221.

It can be written as a sum of positive squares in 3 ways, for example, as 999634689 + 225930961 = 31617^2 + 15031^2 .

It is a super-2 number, since 2×1225565650² = 3004022324919845000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12255607 + ... + 12255706.

Almost surely, 2^1225565650 is an apocalyptic number.

1225565650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225565650 is a deficient number, since it is larger than the sum of its proper divisors (1053986552).

1225565650 is a wasteful number, since it uses less digits than its factorization.

1225565650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24511325 (or 24511320 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 1225565650 is about 35008.0797816733. The cubic root of 1225565650 is about 1070.1521459487.

The spelling of 1225565650 in words is "one billion, two hundred twenty-five million, five hundred sixty-five thousand, six hundred fifty".