181625 has 8 divisors (see below), whose sum is σ = 226824. Its totient is φ = 145200.

The previous prime is 181619. The next prime is 181639. The reversal of 181625 is 526181.

It can be written as a sum of positive squares in 4 ways, for example, as 1849 + 179776 = 43^2 + 424^2 .

It is not a de Polignac number, because 181625 - 2⁴ = 181609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181625.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 181625.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602 + ... + 851.

It is an arithmetic number, because the mean of its divisors is an integer number (28353).

2¹⁸¹⁶²⁵ is an apocalyptic number.

It is an amenable number.

181625 is a deficient number, since it is larger than the sum of its proper divisors (45199).

181625 is an equidigital number, since it uses as much as digits as its factorization.

181625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1458 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 181625 is about 426.1748467472. The cubic root of 181625 is about 56.6315622638.

The spelling of 181625 in words is "one hundred eighty-one thousand, six hundred twenty-five".