1012855845 has 16 divisors (see below), whose sum is σ = 1622548800. Its totient is φ = 539529984.

The previous prime is 1012855813. The next prime is 1012855849. The reversal of 1012855845 is 5485582101.

It is not a de Polignac number, because 1012855845 - 2⁵ = 1012855813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012855849) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28420 + ... + 53229.

It is an arithmetic number, because the mean of its divisors is an integer number (101409300).

Almost surely, 2^1012855845 is an apocalyptic number.

1012855845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1012855845 is a deficient number, since it is larger than the sum of its proper divisors (609692955).

1012855845 is an equidigital number, since it uses as much as digits as its factorization.

1012855845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82484.

The product of its (nonzero) digits is 64000, while the sum is 39.

The square root of 1012855845 is about 31825.3962269129. The cubic root of 1012855845 is about 1004.2670480697.

The spelling of 1012855845 in words is "one billion, twelve million, eight hundred fifty-five thousand, eight hundred forty-five".