1998741 has 8 divisors (see below), whose sum is σ = 2821824. Its totient is φ = 1254080.

The previous prime is 1998739. The next prime is 1998761. The reversal of 1998741 is 1478991.

It is a happy number.

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 1998741 - 2¹ = 1998739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1998741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998701) 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, 19545 + ... + 19646.

It is an arithmetic number, because the mean of its divisors is an integer number (352728).

2^1998741 is an apocalyptic number.

It is an amenable number.

1998741 is a deficient number, since it is larger than the sum of its proper divisors (823083).

1998741 is a wasteful number, since it uses less digits than its factorization.

1998741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39211.

The product of its digits is 18144, while the sum is 39.

The square root of 1998741 is about 1413.7683685809. The cubic root of 1998741 is about 125.9656620967.

The spelling of 1998741 in words is "one million, nine hundred ninety-eight thousand, seven hundred forty-one".