998251 has 4 divisors (see below), whose sum is σ = 1001952. Its totient is φ = 994552.

The previous prime is 998243. The next prime is 998273. The reversal of 998251 is 152899.

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

It is a cyclic number.

It is not a de Polignac number, because 998251 - 2³ = 998243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411 + ... + 1996.

It is an arithmetic number, because the mean of its divisors is an integer number (250488).

2⁹⁹⁸²⁵¹ is an apocalyptic number.

998251 is a deficient number, since it is larger than the sum of its proper divisors (3701).

998251 is a wasteful number, since it uses less digits than its factorization.

998251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700.

The product of its digits is 6480, while the sum is 34.

The square root of 998251 is about 999.1251172901. The cubic root of 998251 is about 99.9416659780.

The spelling of 998251 in words is "nine hundred ninety-eight thousand, two hundred fifty-one".