1681912 has 32 divisors (see below), whose sum is σ = 3402000. Its totient is φ = 776704.

The previous prime is 1681907. The next prime is 1681931. The reversal of 1681912 is 2191861.

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, 11214 + ... + 11362.

2^1681912 is an apocalyptic number.

It is an amenable number.

1681912 is an abundant number, since it is smaller than the sum of its proper divisors (1720088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681912 is a wasteful number, since it uses less digits than its factorization.

1681912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 251 counting only the distinct ones).

The product of its digits is 864, while the sum is 28.

The square root of 1681912 is about 1296.8854999575. The cubic root of 1681912 is about 118.9235202858.

It can be divided in two parts, 168 and 1912, that added together give a triangular number (2080 = T₆₄).

The spelling of 1681912 in words is "one million, six hundred eighty-one thousand, nine hundred twelve".