398127 has 4 divisors (see below), whose sum is σ = 530840. Its totient is φ = 265416.

The previous prime is 398119. The next prime is 398129. The reversal of 398127 is 721893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 721893 = 3 ⋅240631.

It is not a de Polignac number, because 398127 - 2³ = 398119 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398094 and 398103.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398127.

It is not an unprimeable number, because it can be changed into a prime (398129) 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, 66352 + ... + 66357.

It is an arithmetic number, because the mean of its divisors is an integer number (132710).

2³⁹⁸¹²⁷ is an apocalyptic number.

398127 is a deficient number, since it is larger than the sum of its proper divisors (132713).

398127 is a wasteful number, since it uses less digits than its factorization.

398127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132712.

The product of its digits is 3024, while the sum is 30.

The square root of 398127 is about 630.9730580619. The cubic root of 398127 is about 73.5654468203.

It can be divided in two parts, 398 and 127, that added together give a palindrome (525).

The spelling of 398127 in words is "three hundred ninety-eight thousand, one hundred twenty-seven".