7871625 has 24 divisors (see below), whose sum is σ = 14191944. Its totient is φ = 4197600.

The previous prime is 7871621. The next prime is 7871627. The reversal of 7871625 is 5261787.

It can be written as a sum of positive squares in 4 ways, for example, as 710649 + 7160976 = 843^2 + 2676^2 .

It is not a de Polignac number, because 7871625 - 2² = 7871621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7871625.

It is not an unprimeable number, because it can be changed into a prime (7871621) 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, 2374 + ... + 4623.

It is an arithmetic number, because the mean of its divisors is an integer number (591331).

Almost surely, 2^7871625 is an apocalyptic number.

7871625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7871625 is a deficient number, since it is larger than the sum of its proper divisors (6320319).

7871625 is a wasteful number, since it uses less digits than its factorization.

7871625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7018 (or 7005 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 7871625 is about 2805.6416378433. The cubic root of 7871625 is about 198.9244344964.

The spelling of 7871625 in words is "seven million, eight hundred seventy-one thousand, six hundred twenty-five".