1681942 has 16 divisors (see below), whose sum is σ = 2669760. Its totient is φ = 793408.

The previous prime is 1681931. The next prime is 1681957. The reversal of 1681942 is 2491861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2418 + ... + 3034.

It is an arithmetic number, because the mean of its divisors is an integer number (166860).

2^1681942 is an apocalyptic number.

1681942 is a deficient number, since it is larger than the sum of its proper divisors (987818).

1681942 is a wasteful number, since it uses less digits than its factorization.

1681942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695.

The product of its digits is 3456, while the sum is 31.

The square root of 1681942 is about 1296.8970660773. The cubic root of 1681942 is about 118.9242273550.

It can be divided in two parts, 16819 and 42, that added together give a palindrome (16861).

The spelling of 1681942 in words is "one million, six hundred eighty-one thousand, nine hundred forty-two".