13621641 has 16 divisors (see below), whose sum is σ = 20979648. Its totient is φ = 7769600.

The previous prime is 13621637. The next prime is 13621649. The reversal of 13621641 is 14612631.

13621641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13621641 - 2² = 13621637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13621649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11580 + ... + 12701.

It is an arithmetic number, because the mean of its divisors is an integer number (1311228).

Almost surely, 2^13621641 is an apocalyptic number.

13621641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13621641 is a deficient number, since it is larger than the sum of its proper divisors (7358007).

13621641 is a wasteful number, since it uses less digits than its factorization.

13621641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24312.

The product of its digits is 864, while the sum is 24.

The square root of 13621641 is about 3690.7507366388. The cubic root of 13621641 is about 238.8231799647.

It can be divided in two parts, 1362 and 1641, that added together give a palindrome (3003).

The spelling of 13621641 in words is "thirteen million, six hundred twenty-one thousand, six hundred forty-one".