1662243 has 16 divisors (see below), whose sum is σ = 2560896. Its totient is φ = 947840.

The previous prime is 1662229. The next prime is 1662257. The reversal of 1662243 is 3422661.

It is an interprime number because it is at equal distance from previous prime (1662229) and next prime (1662257).

It is a cyclic number.

It is not a de Polignac number, because 1662243 - 2⁵ = 1662211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662223) 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 15 ways as a sum of consecutive naturals, for example, 921 + ... + 2042.

It is an arithmetic number, because the mean of its divisors is an integer number (160056).

2^1662243 is an apocalyptic number.

1662243 is a deficient number, since it is larger than the sum of its proper divisors (898653).

1662243 is a wasteful number, since it uses less digits than its factorization.

1662243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its digits is 1728, while the sum is 24.

The square root of 1662243 is about 1289.2800316456. The cubic root of 1662243 is about 118.4581204713.

The spelling of 1662243 in words is "one million, six hundred sixty-two thousand, two hundred forty-three".