1662047 has 4 divisors (see below), whose sum is σ = 1670136. Its totient is φ = 1653960.

The previous prime is 1662041. The next prime is 1662083. The reversal of 1662047 is 7402661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1662047 - 2⁶ = 1661983 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 (1662041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3728 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (417534).

2^1662047 is an apocalyptic number.

1662047 is a deficient number, since it is larger than the sum of its proper divisors (8089).

1662047 is an equidigital number, since it uses as much as digits as its factorization.

1662047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1662047 is about 1289.2040179894. The cubic root of 1662047 is about 118.4534643722.

The spelling of 1662047 in words is "one million, six hundred sixty-two thousand, forty-seven".