1642806 has 24 divisors (see below), whose sum is σ = 3883464. Its totient is φ = 497760.

The previous prime is 1642801. The next prime is 1642807. The reversal of 1642806 is 6082461.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1642806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3951 + ... + 4346.

It is an arithmetic number, because the mean of its divisors is an integer number (161811).

2^1642806 is an apocalyptic number.

1642806 is an abundant number, since it is smaller than the sum of its proper divisors (2240658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642806 is a wasteful number, since it uses less digits than its factorization.

1642806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316 (or 8313 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1642806 is about 1281.7199382080. The cubic root of 1642806 is about 117.9945894292.

The spelling of 1642806 in words is "one million, six hundred forty-two thousand, eight hundred six".