13840025 has 6 divisors (see below), whose sum is σ = 17161662. Its totient is φ = 11072000.

The previous prime is 13840003. The next prime is 13840033. The reversal of 13840025 is 52004831.

It can be written as a sum of positive squares in 3 ways, for example, as 120409 + 13719616 = 347^2 + 3704^2 .

It is not a de Polignac number, because 13840025 - 2¹⁶ = 13774489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276776 + ... + 276825.

It is an arithmetic number, because the mean of its divisors is an integer number (2860277).

Almost surely, 2^13840025 is an apocalyptic number.

It is an amenable number.

13840025 is a deficient number, since it is larger than the sum of its proper divisors (3321637).

13840025 is an equidigital number, since it uses as much as digits as its factorization.

13840025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553611 (or 553606 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 13840025 is about 3720.2184075670. The cubic root of 13840025 is about 240.0927014574.

Adding to 13840025 its reverse (52004831), we get a palindrome (65844856).

The spelling of 13840025 in words is "thirteen million, eight hundred forty thousand, twenty-five".