16125805 has 4 divisors (see below), whose sum is σ = 19350972. Its totient is φ = 12900640.

The previous prime is 16125803. The next prime is 16125869. The reversal of 16125805 is 50852161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 3636649 = 3534^2 + 1907^2 .

It is not a de Polignac number, because 16125805 - 2¹ = 16125803 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 (16125803) 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, 1612576 + ... + 1612585.

It is an arithmetic number, because the mean of its divisors is an integer number (4837743).

Almost surely, 2^16125805 is an apocalyptic number.

It is an amenable number.

16125805 is a deficient number, since it is larger than the sum of its proper divisors (3225167).

16125805 is an equidigital number, since it uses as much as digits as its factorization.

16125805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225166.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 16125805 is about 4015.6948340231. The cubic root of 16125805 is about 252.6429214076.

Adding to 16125805 its reverse (50852161), we get a palindrome (66977966).

The spelling of 16125805 in words is "sixteen million, one hundred twenty-five thousand, eight hundred five".