1671946 has 4 divisors (see below), whose sum is σ = 2507922. Its totient is φ = 835972.

The previous prime is 1671941. The next prime is 1671947. The reversal of 1671946 is 6491761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6491761 = 37 ⋅175453.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 314721 = 1165^2 + 561^2 .

It is not an unprimeable number, because it can be changed into a prime (1671941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417985 + ... + 417988.

2^1671946 is an apocalyptic number.

1671946 is a deficient number, since it is larger than the sum of its proper divisors (835976).

1671946 is an equidigital number, since it uses as much as digits as its factorization.

1671946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835975.

The product of its digits is 9072, while the sum is 34.

The square root of 1671946 is about 1293.0375091234. The cubic root of 1671946 is about 118.6881650371.

The spelling of 1671946 in words is "one million, six hundred seventy-one thousand, nine hundred forty-six".