1798121 has 8 divisors (see below), whose sum is σ = 1950984. Its totient is φ = 1647360.

The previous prime is 1798109. The next prime is 1798123. The reversal of 1798121 is 1218971.

It can be written as a sum of positive squares in 4 ways, for example, as 13225 + 1784896 = 115^2 + 1336^2 .

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

It is not a de Polignac number, because 1798121 - 2⁶ = 1798057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1798123) 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, 1601 + ... + 2481.

It is an arithmetic number, because the mean of its divisors is an integer number (243873).

2^1798121 is an apocalyptic number.

It is an amenable number.

1798121 is a deficient number, since it is larger than the sum of its proper divisors (152863).

1798121 is a wasteful number, since it uses less digits than its factorization.

1798121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 1008, while the sum is 29.

The square root of 1798121 is about 1340.9403417006. The cubic root of 1798121 is about 121.6016975539.

The spelling of 1798121 in words is "one million, seven hundred ninety-eight thousand, one hundred twenty-one".