13640001 has 8 divisors (see below), whose sum is σ = 19256544. Its totient is φ = 8558400.

The previous prime is 13639993. The next prime is 13640009. The reversal of 13640001 is 10004631.

It is an interprime number because it is at equal distance from previous prime (13639993) and next prime (13640009).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13640001 - 2³ = 13639993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13640009) by changing a digit.

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, 133675 + ... + 133776.

It is an arithmetic number, because the mean of its divisors is an integer number (2407068).

Almost surely, 2^13640001 is an apocalyptic number.

It is an amenable number.

13640001 is a deficient number, since it is larger than the sum of its proper divisors (5616543).

13640001 is a wasteful number, since it uses less digits than its factorization.

13640001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267471.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13640001 is about 3693.2371979065. The cubic root of 13640001 is about 238.9304314830.

Adding to 13640001 its reverse (10004631), we get a palindrome (23644632).

The spelling of 13640001 in words is "thirteen million, six hundred forty thousand, one".