1682121 has 12 divisors (see below), whose sum is σ = 2609232. Its totient is φ = 961128.

The previous prime is 1682119. The next prime is 1682123. The reversal of 1682121 is 1212861.

It is an interprime number because it is at equal distance from previous prime (1682119) and next prime (1682123).

It is not a de Polignac number, because 1682121 - 2¹ = 1682119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

1682121 is a modest number, since divided by 2121 gives 168 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1682123) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 5575 + ... + 5868.

It is an arithmetic number, because the mean of its divisors is an integer number (217436).

2^1682121 is an apocalyptic number.

It is an amenable number.

1682121 is a deficient number, since it is larger than the sum of its proper divisors (927111).

1682121 is a wasteful number, since it uses less digits than its factorization.

1682121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460 (or 11453 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 1682121 is about 1296.9660751153. The cubic root of 1682121 is about 118.9284460263.

Adding to 1682121 its reverse (1212861), we get a palindrome (2894982).

The spelling of 1682121 in words is "one million, six hundred eighty-two thousand, one hundred twenty-one".