1646961 has 8 divisors (see below), whose sum is σ = 2291520. Its totient is φ = 1050192.

The previous prime is 1646959. The next prime is 1646971. The reversal of 1646961 is 1696461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1646961 - 2¹ = 1646959 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1646921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11866 + ... + 12003.

It is an arithmetic number, because the mean of its divisors is an integer number (286440).

2^1646961 is an apocalyptic number.

It is an amenable number.

1646961 is a deficient number, since it is larger than the sum of its proper divisors (644559).

1646961 is a wasteful number, since it uses less digits than its factorization.

1646961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23895.

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

The square root of 1646961 is about 1283.3397835336. The cubic root of 1646961 is about 118.0939833461.

The spelling of 1646961 in words is "one million, six hundred forty-six thousand, nine hundred sixty-one".