1621108 has 6 divisors (see below), whose sum is σ = 2836946. Its totient is φ = 810552.

The previous prime is 1621097. The next prime is 1621127. The reversal of 1621108 is 8011261.

It can be written as a sum of positive squares in only one way, i.e., 1411344 + 209764 = 1188^2 + 458^2 .

It is a super-2 number, since 2×1621108² = 5255982295328, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202635 + ... + 202642.

2^1621108 is an apocalyptic number.

It is an amenable number.

1621108 is a deficient number, since it is larger than the sum of its proper divisors (1215838).

1621108 is a wasteful number, since it uses less digits than its factorization.

1621108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405281 (or 405279 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1621108 is about 1273.2273952441. The cubic root of 1621108 is about 117.4727988943.

Adding to 1621108 its reverse (8011261), we get a palindrome (9632369).

The spelling of 1621108 in words is "one million, six hundred twenty-one thousand, one hundred eight".