1641466 has 4 divisors (see below), whose sum is σ = 2462202. Its totient is φ = 820732.

The previous prime is 1641457. The next prime is 1641473. The reversal of 1641466 is 6641461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6641461 = 197 ⋅33713.

It can be written as a sum of positive squares in only one way, i.e., 1635841 + 5625 = 1279^2 + 75^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410365 + ... + 410368.

2^1641466 is an apocalyptic number.

1641466 is a deficient number, since it is larger than the sum of its proper divisors (820736).

1641466 is an equidigital number, since it uses as much as digits as its factorization.

1641466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820735.

The product of its digits is 3456, while the sum is 28.

The square root of 1641466 is about 1281.1970964688. The cubic root of 1641466 is about 117.9624988559.

The spelling of 1641466 in words is "one million, six hundred forty-one thousand, four hundred sixty-six".