16126645 has 4 divisors (see below), whose sum is σ = 19351980. Its totient is φ = 12901312.

The previous prime is 16126637. The next prime is 16126667. The reversal of 16126645 is 54662161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54662161 = 61 ⋅896101.

It can be written as a sum of positive squares in 2 ways, for example, as 10850436 + 5276209 = 3294^2 + 2297^2 .

It is a cyclic number.

It is not a de Polignac number, because 16126645 - 2³ = 16126637 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 1612660 + ... + 1612669.

It is an arithmetic number, because the mean of its divisors is an integer number (4837995).

Almost surely, 2^16126645 is an apocalyptic number.

It is an amenable number.

16126645 is a deficient number, since it is larger than the sum of its proper divisors (3225335).

16126645 is an equidigital number, since it uses as much as digits as its factorization.

16126645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225334.

The product of its digits is 8640, while the sum is 31.

The square root of 16126645 is about 4015.7994222819. The cubic root of 16126645 is about 252.6473080903.

The spelling of 16126645 in words is "sixteen million, one hundred twenty-six thousand, six hundred forty-five".