1245140856 has 32 divisors (see below), whose sum is σ = 3458725200. Its totient is φ = 415046880.

The previous prime is 1245140821. The next prime is 1245140867. The reversal of 1245140856 is 6580415421.

It is a happy number.

1245140856 is a `hidden beast` number, since 1 + 245 + 1 + 408 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1245140856.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2882055 + ... + 2882486.

Almost surely, 2^1245140856 is an apocalyptic number.

It is an amenable number.

1245140856 is an abundant number, since it is smaller than the sum of its proper divisors (2213584344).

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

1245140856 is a wasteful number, since it uses less digits than its factorization.

1245140856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5764556 (or 5764546 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 1245140856 is about 35286.5534729591. The cubic root of 1245140856 is about 1075.8197046392.

The spelling of 1245140856 in words is "one billion, two hundred forty-five million, one hundred forty thousand, eight hundred fifty-six".