13251641 has 4 divisors (see below), whose sum is σ = 14271012. Its totient is φ = 12232272.

The previous prime is 13251547. The next prime is 13251647. The reversal of 13251641 is 14615231.

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 2493241 + 10758400 = 1579^2 + 3280^2 .

It is not a de Polignac number, because 13251641 - 2²² = 9057337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13251647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509666 + ... + 509691.

It is an arithmetic number, because the mean of its divisors is an integer number (3567753).

Almost surely, 2^13251641 is an apocalyptic number.

It is an amenable number.

13251641 is a deficient number, since it is larger than the sum of its proper divisors (1019371).

13251641 is a wasteful number, since it uses less digits than its factorization.

13251641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019370.

The product of its digits is 720, while the sum is 23.

The square root of 13251641 is about 3640.2803463470. The cubic root of 13251641 is about 236.6409430042.

Adding to 13251641 its reverse (14615231), we get a palindrome (27866872).

The spelling of 13251641 in words is "thirteen million, two hundred fifty-one thousand, six hundred forty-one".