1245556668 has 24 divisors (see below), whose sum is σ = 2917614672. Its totient is φ = 413569024.

The previous prime is 1245556601. The next prime is 1245556673. The reversal of 1245556668 is 8666555421.

It is a super-2 number, since 2×1245556668² = 3102822826398524448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198855 + ... + 205022.

It is an arithmetic number, because the mean of its divisors is an integer number (121567278).

Almost surely, 2^1245556668 is an apocalyptic number.

It is an amenable number.

1245556668 is an abundant number, since it is smaller than the sum of its proper divisors (1672058004).

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

1245556668 is a wasteful number, since it uses less digits than its factorization.

1245556668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404141 (or 404139 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The square root of 1245556668 is about 35292.4449138906. Note that the first 3 decimals coincide. The cubic root of 1245556668 is about 1075.9394471712.

The spelling of 1245556668 in words is "one billion, two hundred forty-five million, five hundred fifty-six thousand, six hundred sixty-eight".