16454621 has 4 divisors (see below), whose sum is σ = 16563744. Its totient is φ = 16345500.

The previous prime is 16454611. The next prime is 16454651. The reversal of 16454621 is 12645461.

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 not a de Polignac number, because 16454621 - 2¹⁰ = 16453597 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 (16454611) 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, 54335 + ... + 54636.

It is an arithmetic number, because the mean of its divisors is an integer number (4140936).

Almost surely, 2^16454621 is an apocalyptic number.

It is an amenable number.

16454621 is a deficient number, since it is larger than the sum of its proper divisors (109123).

16454621 is a wasteful number, since it uses less digits than its factorization.

16454621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109122.

The product of its digits is 5760, while the sum is 29.

The square root of 16454621 is about 4056.4295877039. The cubic root of 16454621 is about 254.3485666379.

The spelling of 16454621 in words is "sixteen million, four hundred fifty-four thousand, six hundred twenty-one".