40025 has 6 divisors (see below), whose sum is σ = 49662. Its totient is φ = 32000.

The previous prime is 40013. The next prime is 40031. The reversal of 40025 is 52004.

40025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 13456 + 26569 = 116^2 + 163^2 .

It is a sliding number, since 40025 = 25 + 40000 and 1/25 + 1/40000 = 0.040025.

It is not a de Polignac number, because 40025 - 2⁴ = 40009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 39988 and 40015.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 776 + ... + 825.

It is an arithmetic number, because the mean of its divisors is an integer number (8277).

2⁴⁰⁰²⁵ is an apocalyptic number.

It is an amenable number.

40025 is a deficient number, since it is larger than the sum of its proper divisors (9637).

40025 is a wasteful number, since it uses less digits than its factorization.

40025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 40025 is about 200.0624902374. The cubic root of 40025 is about 34.2066423495.

Adding to 40025 its reverse (52004), we get a palindrome (92029).

It can be divided in two parts, 400 and 25, that multiplied together give a 4-th power (10000 = 10⁴).

The spelling of 40025 in words is "forty thousand, twenty-five".