16424257 has 4 divisors (see below), whose sum is σ = 16449840. Its totient is φ = 16398676.

The previous prime is 16424251. The next prime is 16424267. The reversal of 16424257 is 75242461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75242461 = 7 ⋅10748923.

It is a cyclic number.

It is not a de Polignac number, because 16424257 - 2³ = 16424249 is a prime.

It is a Duffinian number.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (16424251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11803 + ... + 13120.

It is an arithmetic number, because the mean of its divisors is an integer number (4112460).

Almost surely, 2^16424257 is an apocalyptic number.

It is an amenable number.

16424257 is a deficient number, since it is larger than the sum of its proper divisors (25583).

16424257 is an equidigital number, since it uses as much as digits as its factorization.

16424257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25582.

The product of its digits is 13440, while the sum is 31.

The square root of 16424257 is about 4052.6851592494. The cubic root of 16424257 is about 254.1920190185.

The spelling of 16424257 in words is "sixteen million, four hundred twenty-four thousand, two hundred fifty-seven".