855000075 has 24 divisors (see below), whose sum is σ = 1416378096. Its totient is φ = 455104000.

The previous prime is 855000071. The next prime is 855000079. The reversal of 855000075 is 570000558.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (855000071) and next prime (855000079).

It is not a de Polignac number, because 855000075 - 2² = 855000071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855000071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28135 + ... + 50015.

It is an arithmetic number, because the mean of its divisors is an integer number (59015754).

Almost surely, 2^855000075 is an apocalyptic number.

855000075 is the 15630-th nonagonal number.

855000075 is a deficient number, since it is larger than the sum of its proper divisors (561378021).

855000075 is a wasteful number, since it uses less digits than its factorization.

855000075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22415 (or 22410 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 855000075 is about 29240.3843168998. The cubic root of 855000075 is about 949.1220235550.

The spelling of 855000075 in words is "eight hundred fifty-five million, seventy-five", and thus it is an aban number.