1681941 has 8 divisors (see below), whose sum is σ = 2257504. Its totient is φ = 1113840.

The previous prime is 1681931. The next prime is 1681957. The reversal of 1681941 is 1491861.

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

It is not a de Polignac number, because 1681941 - 2⁶ = 1681877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1681899 and 1681908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315 + ... + 2256.

It is an arithmetic number, because the mean of its divisors is an integer number (282188).

2^1681941 is an apocalyptic number.

It is an amenable number.

1681941 is a deficient number, since it is larger than the sum of its proper divisors (575563).

1681941 is a wasteful number, since it uses less digits than its factorization.

1681941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3731.

The product of its digits is 1728, while the sum is 30.

The square root of 1681941 is about 1296.8966805417. The cubic root of 1681941 is about 118.9242037861.

The spelling of 1681941 in words is "one million, six hundred eighty-one thousand, nine hundred forty-one".