1663042 has 16 divisors (see below), whose sum is σ = 2707992. Its totient is φ = 762880.

The previous prime is 1663031. The next prime is 1663073. The reversal of 1663042 is 2403661.

It can be written as a sum of positive squares in 4 ways, for example, as 1252161 + 410881 = 1119^2 + 641^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 798 + ... + 1990.

2^1663042 is an apocalyptic number.

1663042 is a deficient number, since it is larger than the sum of its proper divisors (1044950).

1663042 is a wasteful number, since it uses less digits than its factorization.

1663042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1663042 is about 1289.5898572802. The cubic root of 1663042 is about 118.4770974154.

The spelling of 1663042 in words is "one million, six hundred sixty-three thousand, forty-two".