1681946 has 32 divisors (see below), whose sum is σ = 3151872. Its totient is φ = 656640.

The previous prime is 1681931. The next prime is 1681957. The reversal of 1681946 is 6491861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8711 + ... + 8901.

It is an arithmetic number, because the mean of its divisors is an integer number (98496).

2^1681946 is an apocalyptic number.

1681946 is a deficient number, since it is larger than the sum of its proper divisors (1469926).

1681946 is a wasteful number, since it uses less digits than its factorization.

1681946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254.

The product of its digits is 10368, while the sum is 35.

The square root of 1681946 is about 1296.8986082189. The cubic root of 1681946 is about 118.9243216302.

The spelling of 1681946 in words is "one million, six hundred eighty-one thousand, nine hundred forty-six".