1646361 has 6 divisors (see below), whose sum is σ = 2378090. Its totient is φ = 1097568.

The previous prime is 1646357. The next prime is 1646371. The reversal of 1646361 is 1636461.

It can be written as a sum of positive squares in only one way, i.e., 1625625 + 20736 = 1275^2 + 144^2 .

It is not a de Polignac number, because 1646361 - 2² = 1646357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1646311) 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 5 ways as a sum of consecutive naturals, for example, 91456 + ... + 91473.

2^1646361 is an apocalyptic number.

It is an amenable number.

1646361 is a deficient number, since it is larger than the sum of its proper divisors (731729).

1646361 is a wasteful number, since it uses less digits than its factorization.

1646361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182935 (or 182932 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1646361 is about 1283.1059971803. The cubic root of 1646361 is about 118.0796407688.

The spelling of 1646361 in words is "one million, six hundred forty-six thousand, three hundred sixty-one".