19625 has 8 divisors (see below), whose sum is σ = 24648. Its totient is φ = 15600.

The previous prime is 19609. The next prime is 19661. The reversal of 19625 is 52691.

It can be written as a sum of positive squares in 4 ways, for example, as 1936 + 17689 = 44^2 + 133^2 .

It is not a de Polignac number, because 19625 - 2⁴ = 19609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 19625.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47 + ... + 203.

It is an arithmetic number, because the mean of its divisors is an integer number (3081).

2¹⁹⁶²⁵ is an apocalyptic number.

It is an amenable number.

19625 is a deficient number, since it is larger than the sum of its proper divisors (5023).

19625 is an equidigital number, since it uses as much as digits as its factorization.

19625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 162 counting only the distinct ones).

The product of its digits is 540, while the sum is 23.

The square root of 19625 is about 140.0892572612. The cubic root of 19625 is about 26.9734535605.

It can be divided in two parts, 196 and 25, that multiplied together give a square (4900 = 70²).

The spelling of 19625 in words is "nineteen thousand, six hundred twenty-five".