13001641 has 4 divisors (see below), whose sum is σ = 13084612. Its totient is φ = 12918672.

The previous prime is 13001627. The next prime is 13001663. The reversal of 13001641 is 14610031.

13001641 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.

It can be written as a sum of positive squares in 2 ways, for example, as 6651241 + 6350400 = 2579^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 13001641 - 2⁹ = 13001129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13001621) 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, 41250 + ... + 41563.

It is an arithmetic number, because the mean of its divisors is an integer number (3271153).

Almost surely, 2^13001641 is an apocalyptic number.

It is an amenable number.

13001641 is a deficient number, since it is larger than the sum of its proper divisors (82971).

13001641 is an equidigital number, since it uses as much as digits as its factorization.

13001641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82970.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13001641 is about 3605.7788340385. The cubic root of 13001641 is about 235.1433620487.

Adding to 13001641 its reverse (14610031), we get a palindrome (27611672).

The spelling of 13001641 in words is "thirteen million, one thousand, six hundred forty-one".