1599998 has 4 divisors (see below), whose sum is σ = 2400000. Its totient is φ = 799998.

The previous prime is 1599977. The next prime is 1600033. The reversal of 1599998 is 8999951.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399998 + ... + 400001.

It is an arithmetic number, because the mean of its divisors is an integer number (600000).

2^1599998 is an apocalyptic number.

1599998 is a deficient number, since it is larger than the sum of its proper divisors (800002).

1599998 is an equidigital number, since it uses as much as digits as its factorization.

1599998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800001.

The product of its digits is 262440, while the sum is 50.

The square root of 1599998 is about 1264.9102734977. The cubic root of 1599998 is about 116.9606607949.

The spelling of 1599998 in words is "one million, five hundred ninety-nine thousand, nine hundred ninety-eight".