1225003866 has 16 divisors (see below), whose sum is σ = 2506985184. Its totient is φ = 398838384.

The previous prime is 1225003861. The next prime is 1225003931. The reversal of 1225003866 is 6683005221.

It is not an unprimeable number, because it can be changed into a prime (1225003861) 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 in 7 ways as a sum of consecutive naturals, for example, 2373781 + ... + 2374296.

It is an arithmetic number, because the mean of its divisors is an integer number (156686574).

Almost surely, 2^1225003866 is an apocalyptic number.

1225003866 is an abundant number, since it is smaller than the sum of its proper divisors (1281981318).

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

1225003866 is a wasteful number, since it uses less digits than its factorization.

1225003866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748125.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1225003866 is about 35000.0552285279. The cubic root of 1225003866 is about 1069.9886061616.

The spelling of 1225003866 in words is "one billion, two hundred twenty-five million, three thousand, eight hundred sixty-six".