1663072 has 12 divisors (see below), whose sum is σ = 3274236. Its totient is φ = 831520.

The previous prime is 1663031. The next prime is 1663073. The reversal of 1663072 is 2703661.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663073) by changing a digit.

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 as a sum of consecutive naturals, namely, 25954 + ... + 26017.

It is an arithmetic number, because the mean of its divisors is an integer number (272853).

2^1663072 is an apocalyptic number.

It is an amenable number.

1663072 is a deficient number, since it is larger than the sum of its proper divisors (1611164).

1663072 is an equidigital number, since it uses as much as digits as its factorization.

1663072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51981 (or 51973 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1663072 is about 1289.6014888329. The cubic root of 1663072 is about 118.4778098230.

The spelling of 1663072 in words is "one million, six hundred sixty-three thousand, seventy-two".