1225243408 has 10 divisors (see below), whose sum is σ = 2373909134. Its totient is φ = 612621696.

The previous prime is 1225243403. The next prime is 1225243421. The reversal of 1225243408 is 8043425221.

It can be written as a sum of positive squares in only one way, i.e., 950612224 + 274631184 = 30832^2 + 16572^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1225243408.

It is not an unprimeable number, because it can be changed into a prime (1225243403) by changing a digit.

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 as a sum of consecutive naturals, namely, 38288841 + ... + 38288872.

Almost surely, 2^1225243408 is an apocalyptic number.

It is an amenable number.

1225243408 is a deficient number, since it is larger than the sum of its proper divisors (1148665726).

1225243408 is an equidigital number, since it uses as much as digits as its factorization.

1225243408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76577721 (or 76577715 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 1225243408 is about 35003.4770844269. The cubic root of 1225243408 is about 1070.0583448547.

Adding to 1225243408 its reverse (8043425221), we get a palindrome (9268668629).

The spelling of 1225243408 in words is "one billion, two hundred twenty-five million, two hundred forty-three thousand, four hundred eight".