13870001 has 4 divisors (see below), whose sum is σ = 13877604. Its totient is φ = 13862400.

The previous prime is 13869991. The next prime is 13870039. The reversal of 13870001 is 10007831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10007831 = 53 ⋅188827.

It can be written as a sum of positive squares in 2 ways, for example, as 10086976 + 3783025 = 3176^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 13870001 - 2²² = 9675697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13870061) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 761 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (3469401).

Almost surely, 2^13870001 is an apocalyptic number.

13870001 is the 3041-st pentagonal number.

It is an amenable number.

13870001 is a deficient number, since it is larger than the sum of its proper divisors (7603).

13870001 is an equidigital number, since it uses as much as digits as its factorization.

13870001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7602.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 13870001 is about 3724.2450241626. The cubic root of 13870001 is about 240.2659147542.

Adding to 13870001 its reverse (10007831), we get a palindrome (23877832).

The spelling of 13870001 in words is "thirteen million, eight hundred seventy thousand, one".