398451 has 4 divisors (see below), whose sum is σ = 531272. Its totient is φ = 265632.

The previous prime is 398441. The next prime is 398459. The reversal of 398451 is 154893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154893 = 3 ⋅51631.

It is not a de Polignac number, because 398451 - 2⁷ = 398323 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398451.

It is not an unprimeable number, because it can be changed into a prime (398459) 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, 66406 + ... + 66411.

It is an arithmetic number, because the mean of its divisors is an integer number (132818).

2³⁹⁸⁴⁵¹ is an apocalyptic number.

398451 is a deficient number, since it is larger than the sum of its proper divisors (132821).

398451 is a wasteful number, since it uses less digits than its factorization.

398451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132820.

The product of its digits is 4320, while the sum is 30.

The square root of 398451 is about 631.2297521505. The cubic root of 398451 is about 73.5853975244.

The spelling of 398451 in words is "three hundred ninety-eight thousand, four hundred fifty-one".