1799921 has 8 divisors (see below), whose sum is σ = 1850688. Its totient is φ = 1750000.

The previous prime is 1799887. The next prime is 1799923. The reversal of 1799921 is 1299971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1799921 - 2¹⁰ = 1798897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1799923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7046 + ... + 7296.

It is an arithmetic number, because the mean of its divisors is an integer number (231336).

2^1799921 is an apocalyptic number.

It is an amenable number.

1799921 is a deficient number, since it is larger than the sum of its proper divisors (50767).

1799921 is a wasteful number, since it uses less digits than its factorization.

1799921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423.

The product of its digits is 10206, while the sum is 38.

The square root of 1799921 is about 1341.6113446151. The cubic root of 1799921 is about 121.6422602782.

The spelling of 1799921 in words is "one million, seven hundred ninety-nine thousand, nine hundred twenty-one".