1245907856 has 20 divisors (see below), whose sum is σ = 2491816704. Its totient is φ = 602858400.

The previous prime is 1245907847. The next prime is 1245907891. The reversal of 1245907856 is 6587095421.

It is a happy number.

1245907856 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1245907856.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1255460 + ... + 1256451.

Almost surely, 2^1245907856 is an apocalyptic number.

1245907856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1245907856 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1245907856 is a wasteful number, since it uses less digits than its factorization.

1245907856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511950 (or 2511944 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 1245907856 is about 35297.4199623712. The cubic root of 1245907856 is about 1076.0405589941.

The spelling of 1245907856 in words is "one billion, two hundred forty-five million, nine hundred seven thousand, eight hundred fifty-six".