2161626 has 8 divisors (see below), whose sum is σ = 4323264. Its totient is φ = 720540.

The previous prime is 2161613. The next prime is 2161633. The reversal of 2161626 is 6261612.

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

2161626 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2161596 and 2161605.

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, 180130 + ... + 180141.

It is an arithmetic number, because the mean of its divisors is an integer number (540408).

2^2161626 is an apocalyptic number.

2161626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161626 is a wasteful number, since it uses less digits than its factorization.

2161626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360276.

The product of its digits is 864, while the sum is 24.

The square root of 2161626 is about 1470.2469180379. The cubic root of 2161626 is about 129.2985094774.

The spelling of 2161626 in words is "two million, one hundred sixty-one thousand, six hundred twenty-six".