16678241 has 4 divisors (see below), whose sum is σ = 17659332. Its totient is φ = 15697152.

The previous prime is 16678229. The next prime is 16678247. The reversal of 16678241 is 14287661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14287661 = 37 ⋅386153.

It can be written as a sum of positive squares in 2 ways, for example, as 12285025 + 4393216 = 3505^2 + 2096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16678241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16678247) 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, 490520 + ... + 490553.

It is an arithmetic number, because the mean of its divisors is an integer number (4414833).

Almost surely, 2^16678241 is an apocalyptic number.

It is an amenable number.

16678241 is a deficient number, since it is larger than the sum of its proper divisors (981091).

16678241 is an equidigital number, since it uses as much as digits as its factorization.

16678241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981090.

The product of its digits is 16128, while the sum is 35.

The square root of 16678241 is about 4083.9002191533. The cubic root of 16678241 is about 255.4955939207.

The spelling of 16678241 in words is "sixteen million, six hundred seventy-eight thousand, two hundred forty-one".