1626 has 8 divisors (see below), whose sum is σ = 3264. Its totient is φ = 540.

The previous prime is 1621. The next prime is 1627. The reversal of 1626 is 6261.

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

1626 is an admirable number.

It is a Smith number, since the sum of its digits (15) 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 Curzon number.

It is a plaindrome in base 11.

It is a nialpdrome in base 13 and base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1626.

It is not an unprimeable number, because it can be changed into a prime (1621) 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, 130 + ... + 141.

It is an arithmetic number, because the mean of its divisors is an integer number (408).

2¹⁶²⁶ is an apocalyptic number.

1626 is the 26-th centered pentagonal number.

1626 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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632).

1626 is a wasteful number, since it uses less digits than its factorization.

1626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its digits is 72, while the sum is 15.

The square root of 1626 is about 40.3236903073. The cubic root of 1626 is about 11.7590845694.

Adding to 1626 its reverse (6261), we get a palindrome (7887).

The spelling of 1626 in words is "one thousand, six hundred twenty-six".