1998471 has 8 divisors (see below), whose sum is σ = 2715120. Its totient is φ = 1307072.

The previous prime is 1998457. The next prime is 1998473. The reversal of 1998471 is 1748991.

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 1998471 - 2⁷ = 1998343 is a prime.

It is a super-3 number, since 3×1998471³ = 23944998070414323333, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998473) 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, 6126 + ... + 6443.

It is an arithmetic number, because the mean of its divisors is an integer number (339390).

2^1998471 is an apocalyptic number.

1998471 is a deficient number, since it is larger than the sum of its proper divisors (716649).

1998471 is a wasteful number, since it uses less digits than its factorization.

1998471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12625.

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

The square root of 1998471 is about 1413.6728758804. The cubic root of 1998471 is about 125.9599898160.

The spelling of 1998471 in words is "one million, nine hundred ninety-eight thousand, four hundred seventy-one".