1245086856 has 64 divisors (see below), whose sum is σ = 3724627200. Its totient is φ = 383102784.

The previous prime is 1245086849. The next prime is 1245086867. The reversal of 1245086856 is 6586805421.

It is a super-3 number, since 3×1245086856³ (a number of 28 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 218896 + ... + 224511.

It is an arithmetic number, because the mean of its divisors is an integer number (58197300).

Almost surely, 2^1245086856 is an apocalyptic number.

It is an amenable number.

1245086856 is an abundant number, since it is smaller than the sum of its proper divisors (2479540344).

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

1245086856 is a wasteful number, since it uses less digits than its factorization.

1245086856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443435 (or 443425 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 1245086856 is about 35285.7883006743. The cubic root of 1245086856 is about 1075.8041521541.

The spelling of 1245086856 in words is "one billion, two hundred forty-five million, eighty-six thousand, eight hundred fifty-six".