1946661 has 4 divisors (see below), whose sum is σ = 2595552. Its totient is φ = 1297772.

The previous prime is 1946657. The next prime is 1946663. The reversal of 1946661 is 1666491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1946661 - 2² = 1946657 is a prime.

It is a D-number.

1946661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1946663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324441 + ... + 324446.

It is an arithmetic number, because the mean of its divisors is an integer number (648888).

2^1946661 is an apocalyptic number.

It is an amenable number.

1946661 is a deficient number, since it is larger than the sum of its proper divisors (648891).

1946661 is an equidigital number, since it uses as much as digits as its factorization.

1946661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648890.

The product of its digits is 7776, while the sum is 33.

The square root of 1946661 is about 1395.2279383671. The cubic root of 1946661 is about 124.8619489247.

The spelling of 1946661 in words is "one million, nine hundred forty-six thousand, six hundred sixty-one".