1646006 has 4 divisors (see below), whose sum is σ = 2469012. Its totient is φ = 823002.

The previous prime is 1645999. The next prime is 1646017. The reversal of 1646006 is 6006461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6006461 = 83 ⋅72367.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411500 + ... + 411503.

It is an arithmetic number, because the mean of its divisors is an integer number (617253).

2^1646006 is an apocalyptic number.

1646006 is a deficient number, since it is larger than the sum of its proper divisors (823006).

1646006 is an equidigital number, since it uses as much as digits as its factorization.

1646006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823005.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1646006 is about 1282.9676535283. The cubic root of 1646006 is about 118.0711531031.

The spelling of 1646006 in words is "one million, six hundred forty-six thousand, six".