1663441 has 8 divisors (see below), whose sum is σ = 1803200. Its totient is φ = 1525392.

The previous prime is 1663397. The next prime is 1663457. The reversal of 1663441 is 1443661.

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

It is a cyclic number.

It is not a de Polignac number, because 1663441 - 2⁹ = 1662929 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663481) 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, 2266 + ... + 2908.

It is an arithmetic number, because the mean of its divisors is an integer number (225400).

2^1663441 is an apocalyptic number.

It is an amenable number.

1663441 is a deficient number, since it is larger than the sum of its proper divisors (139759).

1663441 is a wasteful number, since it uses less digits than its factorization.

1663441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855.

The product of its digits is 1728, while the sum is 25.

The square root of 1663441 is about 1289.7445483506. The cubic root of 1663441 is about 118.4865717365.

The spelling of 1663441 in words is "one million, six hundred sixty-three thousand, four hundred forty-one".