13481621 has 16 divisors (see below), whose sum is σ = 14991360. Its totient is φ = 12072240.

The previous prime is 13481617. The next prime is 13481627. The reversal of 13481621 is 12618431.

It is a cyclic number.

It is not a de Polignac number, because 13481621 - 2² = 13481617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13481627) 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, 27440 + ... + 27926.

It is an arithmetic number, because the mean of its divisors is an integer number (936960).

Almost surely, 2^13481621 is an apocalyptic number.

It is an amenable number.

13481621 is a deficient number, since it is larger than the sum of its proper divisors (1509739).

13481621 is a wasteful number, since it uses less digits than its factorization.

13481621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584.

The product of its digits is 1152, while the sum is 26.

The square root of 13481621 is about 3671.7326972425. The cubic root of 13481621 is about 238.0020537450.

The spelling of 13481621 in words is "thirteen million, four hundred eighty-one thousand, six hundred twenty-one".