1668535 has 16 divisors (see below), whose sum is σ = 2280960. Its totient is φ = 1159840.

The previous prime is 1668521. The next prime is 1668539. The reversal of 1668535 is 5358661.

It is not a de Polignac number, because 1668535 - 2⁵ = 1668503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1668535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606 + ... + 1924.

It is an arithmetic number, because the mean of its divisors is an integer number (142560).

2^1668535 is an apocalyptic number.

1668535 is a deficient number, since it is larger than the sum of its proper divisors (612425).

1668535 is a wasteful number, since it uses less digits than its factorization.

1668535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358.

The product of its digits is 21600, while the sum is 34.

The square root of 1668535 is about 1291.7178484483. The cubic root of 1668535 is about 118.6073966875.

The spelling of 1668535 in words is "one million, six hundred sixty-eight thousand, five hundred thirty-five".