1225529268 has 12 divisors (see below), whose sum is σ = 2859568320. Its totient is φ = 408509752.

The previous prime is 1225529267. The next prime is 1225529311. The reversal of 1225529268 is 8629255221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225529267) 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 in 3 ways as a sum of consecutive naturals, for example, 51063708 + ... + 51063731.

It is an arithmetic number, because the mean of its divisors is an integer number (238297360).

Almost surely, 2^1225529268 is an apocalyptic number.

It is an amenable number.

1225529268 is an abundant number, since it is smaller than the sum of its proper divisors (1634039052).

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

1225529268 is a wasteful number, since it uses less digits than its factorization.

1225529268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102127446 (or 102127444 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 1225529268 is about 35007.5601549151. The cubic root of 1225529268 is about 1070.1415563731.

The spelling of 1225529268 in words is "one billion, two hundred twenty-five million, five hundred twenty-nine thousand, two hundred sixty-eight".