16425239 has 4 divisors (see below), whose sum is σ = 16433424. Its totient is φ = 16417056.

The previous prime is 16425229. The next prime is 16425259. The reversal of 16425239 is 93252461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16425239 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 (16425229) 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, 1199 + ... + 5855.

It is an arithmetic number, because the mean of its divisors is an integer number (4108356).

Almost surely, 2^16425239 is an apocalyptic number.

16425239 is a deficient number, since it is larger than the sum of its proper divisors (8185).

16425239 is an equidigital number, since it uses as much as digits as its factorization.

16425239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8184.

The product of its digits is 12960, while the sum is 32.

The square root of 16425239 is about 4052.8063116808. The cubic root of 16425239 is about 254.1970849318.

The spelling of 16425239 in words is "sixteen million, four hundred twenty-five thousand, two hundred thirty-nine".