16125405 has 8 divisors (see below), whose sum is σ = 25800672. Its totient is φ = 8600208.

The previous prime is 16125391. The next prime is 16125443. The reversal of 16125405 is 50452161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16125405 - 2⁸ = 16125149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537499 + ... + 537528.

It is an arithmetic number, because the mean of its divisors is an integer number (3225084).

Almost surely, 2^16125405 is an apocalyptic number.

16125405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16125405 is a deficient number, since it is larger than the sum of its proper divisors (9675267).

16125405 is a wasteful number, since it uses less digits than its factorization.

16125405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075035.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 16125405 is about 4015.6450291329. The cubic root of 16125405 is about 252.6408324576.

Adding to 16125405 its reverse (50452161), we get a palindrome (66577566).

The spelling of 16125405 in words is "sixteen million, one hundred twenty-five thousand, four hundred five".