1662039 has 30 divisors (see below), whose sum is σ = 2674584. Its totient is φ = 1028160.

The previous prime is 1662029. The next prime is 1662041. The reversal of 1662039 is 9302661.

It is a happy number.

1662039 is a `hidden beast` number, since 1 + 6 + 620 + 39 = 666.

It is not a de Polignac number, because 1662039 - 2⁵ = 1662007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662029) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 23374 + ... + 23444.

2^1662039 is an apocalyptic number.

1662039 is a deficient number, since it is larger than the sum of its proper divisors (1012545).

1662039 is an equidigital number, since it uses as much as digits as its factorization.

1662039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 1662039 is about 1289.2009152960. The cubic root of 1662039 is about 118.4532743196.

The spelling of 1662039 in words is "one million, six hundred sixty-two thousand, thirty-nine".