998425 has 6 divisors (see below), whose sum is σ = 1238078. Its totient is φ = 798720.

The previous prime is 998423. The next prime is 998429. The reversal of 998425 is 524899.

It can be written as a sum of positive squares in 3 ways, for example, as 186624 + 811801 = 432^2 + 901^2 .

It is not a de Polignac number, because 998425 - 2¹ = 998423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19944 + ... + 19993.

2⁹⁹⁸⁴²⁵ is an apocalyptic number.

It is an amenable number.

998425 is a deficient number, since it is larger than the sum of its proper divisors (239653).

998425 is a wasteful number, since it uses less digits than its factorization.

998425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39947 (or 39942 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 998425 is about 999.2121896774. The cubic root of 998425 is about 99.9474724134.

The spelling of 998425 in words is "nine hundred ninety-eight thousand, four hundred twenty-five".