14721641 has 4 divisors (see below), whose sum is σ = 16059984. Its totient is φ = 13383300.

The previous prime is 14721611. The next prime is 14721661. The reversal of 14721641 is 14612741.

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 a de Polignac number, because none of the positive numbers 2^k-14721641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14721641.

It is not an unprimeable number, because it can be changed into a prime (14721601) 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, 669155 + ... + 669176.

It is an arithmetic number, because the mean of its divisors is an integer number (4014996).

Almost surely, 2^14721641 is an apocalyptic number.

14721641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

14721641 is a deficient number, since it is larger than the sum of its proper divisors (1338343).

14721641 is a wasteful number, since it uses less digits than its factorization.

14721641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338342.

The product of its digits is 1344, while the sum is 26.

The square root of 14721641 is about 3836.8790702862. The cubic root of 14721641 is about 245.0861338130.

Subtracting from 14721641 its reverse (14612741), we obtain a square (108900 = 330²).

It can be divided in two parts, 1472 and 1641, that added together give a palindrome (3113).

The spelling of 14721641 in words is "fourteen million, seven hundred twenty-one thousand, six hundred forty-one".