7981875 has 80 divisors (see below), whose sum is σ = 16494720. Its totient is φ = 3780000.

The previous prime is 7981871. The next prime is 7981877. The reversal of 7981875 is 5781897.

It is not a de Polignac number, because 7981875 - 2² = 7981871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7981875.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981871) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 185604 + ... + 185646.

It is an arithmetic number, because the mean of its divisors is an integer number (206184).

Almost surely, 2^7981875 is an apocalyptic number.

7981875 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7981875 is an abundant number, since it is smaller than the sum of its proper divisors (8512845).

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

7981875 is a wasteful number, since it uses less digits than its factorization.

7981875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 62 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The square root of 7981875 is about 2825.2212302756. The cubic root of 7981875 is about 199.8488441216.

The spelling of 7981875 in words is "seven million, nine hundred eighty-one thousand, eight hundred seventy-five".