16424641 has 4 divisors (see below), whose sum is σ = 16825284. Its totient is φ = 16024000.

The previous prime is 16424627. The next prime is 16424651. The reversal of 16424641 is 14642461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14642461 = 673 ⋅21757.

It can be written as a sum of positive squares in 2 ways, for example, as 1440000 + 14984641 = 1200^2 + 3871^2 .

It is a cyclic number.

It is not a de Polignac number, because 16424641 - 2⁹ = 16424129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16424651) 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, 200260 + ... + 200341.

It is an arithmetic number, because the mean of its divisors is an integer number (4206321).

Almost surely, 2^16424641 is an apocalyptic number.

It is an amenable number.

16424641 is a deficient number, since it is larger than the sum of its proper divisors (400643).

16424641 is an equidigital number, since it uses as much as digits as its factorization.

16424641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400642.

The product of its digits is 4608, while the sum is 28.

The square root of 16424641 is about 4052.7325349695. The cubic root of 16424641 is about 254.1940000107.

The spelling of 16424641 in words is "sixteen million, four hundred twenty-four thousand, six hundred forty-one".