1225620050 has 18 divisors (see below), whose sum is σ = 2280113829. Its totient is φ = 490149000.

The previous prime is 1225620043. The next prime is 1225620073. The reversal of 1225620050 is 500265221.

It can be written as a sum of positive squares in 2 ways, for example, as 1201107649 + 24512401 = 34657^2 + 4951^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24755.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1225619998 and 1225620025.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 245075 + ... + 250025.

Almost surely, 2^1225620050 is an apocalyptic number.

1225620050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225620050 is a deficient number, since it is larger than the sum of its proper divisors (1054493779).

1225620050 is an frugal number, since it uses more digits than its factorization.

1225620050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9914 (or 4958 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1225620050 is about 35008.8567365460. The cubic root of 1225620050 is about 1070.1679795668.

Adding to 1225620050 its reverse (500265221), we get a palindrome (1725885271).

The spelling of 1225620050 in words is "one billion, two hundred twenty-five million, six hundred twenty thousand, fifty".