39925 has 6 divisors (see below), whose sum is σ = 49538. Its totient is φ = 31920.

The previous prime is 39901. The next prime is 39929. The reversal of 39925 is 52993.

It can be written as a sum of positive squares in 3 ways, for example, as 324 + 39601 = 18^2 + 199^2 .

It is a de Polignac number, because none of the positive numbers 2^k-39925 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39893 and 39902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 774 + ... + 823.

2³⁹⁹²⁵ is an apocalyptic number.

It is an amenable number.

39925 is a deficient number, since it is larger than the sum of its proper divisors (9613).

39925 is a wasteful number, since it uses less digits than its factorization.

39925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1602 counting only the distinct ones).

The product of its digits is 2430, while the sum is 28.

The square root of 39925 is about 199.8124120269. The cubic root of 39925 is about 34.1781308611.

It can be divided in two parts, 399 and 25, that added together give a palindrome (424).

The spelling of 39925 in words is "thirty-nine thousand, nine hundred twenty-five".