1225204424 has 8 divisors (see below), whose sum is σ = 2297258310. Its totient is φ = 612602208.

The previous prime is 1225204397. The next prime is 1225204427. The reversal of 1225204424 is 4244025221.

It can be written as a sum of positive squares in only one way, i.e., 1223740324 + 1464100 = 34982^2 + 1210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1225204424² = 3002251761178343552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1225204393 and 1225204402.

It is not an unprimeable number, because it can be changed into a prime (1225204427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76575269 + ... + 76575284.

Almost surely, 2^1225204424 is an apocalyptic number.

It is an amenable number.

1225204424 is a deficient number, since it is larger than the sum of its proper divisors (1072053886).

1225204424 is a wasteful number, since it uses less digits than its factorization.

1225204424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153150559 (or 153150555 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1225204424 is about 35002.9202210330. The cubic root of 1225204424 is about 1070.0469959269.

Adding to 1225204424 its reverse (4244025221), we get a palindrome (5469229645).

The spelling of 1225204424 in words is "one billion, two hundred twenty-five million, two hundred four thousand, four hundred twenty-four".