13172001 has 4 divisors (see below), whose sum is σ = 17562672. Its totient is φ = 8781332.

The previous prime is 13171987. The next prime is 13172023. The reversal of 13172001 is 10027131.

13172001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13172001 - 2⁶ = 13171937 is a prime.

It is a super-2 number, since 2×13172001² = 347003220688002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13172051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195331 + ... + 2195336.

It is an arithmetic number, because the mean of its divisors is an integer number (4390668).

Almost surely, 2^13172001 is an apocalyptic number.

It is an amenable number.

13172001 is a deficient number, since it is larger than the sum of its proper divisors (4390671).

13172001 is an equidigital number, since it uses as much as digits as its factorization.

13172001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390670.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 13172001 is about 3629.3251438801. The cubic root of 13172001 is about 236.1659335285.

Adding to 13172001 its reverse (10027131), we get a palindrome (23199132).

The spelling of 13172001 in words is "thirteen million, one hundred seventy-two thousand, one".