1661344 has 24 divisors (see below), whose sum is σ = 3299940. Its totient is φ = 823296.
The previous prime is 1661333. The next prime is 1661347. The reversal of 1661344 is 4431661.
It can be written as a sum of positive squares in 2 ways, for example, as 1411344 + 250000 = 1188^2 + 500^2 .
It is not an unprimeable number, because it can be changed into a prime (1661347) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6042 + ... + 6310.
21661344 is an apocalyptic number.
It is an amenable number.
1661344 is a deficient number, since it is larger than the sum of its proper divisors (1638596).
1661344 is a wasteful number, since it uses less digits than its factorization.
1661344 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 472 (or 464 counting only the distinct ones).
The product of its digits is 1728, while the sum is 25.
The square root of 1661344 is about 1288.9313402971. The cubic root of 1661344 is about 118.4367611685.
The spelling of 1661344 in words is "one million, six hundred sixty-one thousand, three hundred forty-four".
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