398251 has 4 divisors (see below), whose sum is σ = 455152. Its totient is φ = 341352.

The previous prime is 398249. The next prime is 398261. The reversal of 398251 is 152893.

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 398251 - 2¹ = 398249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398261) 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, 28440 + ... + 28453.

It is an arithmetic number, because the mean of its divisors is an integer number (113788).

2³⁹⁸²⁵¹ is an apocalyptic number.

398251 is a deficient number, since it is larger than the sum of its proper divisors (56901).

398251 is an equidigital number, since it uses as much as digits as its factorization.

398251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56900.

The product of its digits is 2160, while the sum is 28.

The square root of 398251 is about 631.0713113429. The cubic root of 398251 is about 73.5730835531.

The spelling of 398251 in words is "three hundred ninety-eight thousand, two hundred fifty-one".