1325998 has 4 divisors (see below), whose sum is σ = 1989000.
Its totient is φ = 662998.
The previous prime is 1325993. The next prime is 1326001. The reversal of 1325998 is 8995231.
It is a semiprime because it is the product of two primes.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1325993) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331498 + ... + 331501.
It is an arithmetic number, because the mean of its divisors is an integer number (497250).
21325998 is an apocalyptic number.
1325998 is a deficient number, since it is larger than the sum of its proper divisors (663002).
1325998 is an equidigital number, since it uses as much as digits as its factorization.
1325998 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 663001.
The product of its digits is 19440, while the sum is 37.
The square root of 1325998 is about 1151.5198652216.
The cubic root of 1325998 is about 109.8620308793.
The spelling of 1325998 in words is "one million, three hundred twenty-five thousand, nine hundred ninety-eight".