1996851 has 4 divisors (see below), whose sum is σ = 2662472. Its totient is φ = 1331232.

The previous prime is 1996849. The next prime is 1996859. The reversal of 1996851 is 1586991.

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

It is not a de Polignac number, because 1996851 - 2¹ = 1996849 is a prime.

It is a D-number.

It is a Duffinian number.

1996851 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1996859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332806 + ... + 332811.

It is an arithmetic number, because the mean of its divisors is an integer number (665618).

2^1996851 is an apocalyptic number.

1996851 is a deficient number, since it is larger than the sum of its proper divisors (665621).

1996851 is an equidigital number, since it uses as much as digits as its factorization.

1996851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665620.

The product of its digits is 19440, while the sum is 39.

The square root of 1996851 is about 1413.0997841625. The cubic root of 1996851 is about 125.9259453981.

The spelling of 1996851 in words is "one million, nine hundred ninety-six thousand, eight hundred fifty-one".