405098 has 4 divisors (see below), whose sum is σ = 607650. Its totient is φ = 202548.

The previous prime is 405091. The next prime is 405143. The reversal of 405098 is 890504.

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

It can be written as a sum of positive squares in only one way, i.e., 208849 + 196249 = 457^2 + 443^2 .

It is not an unprimeable number, because it can be changed into a prime (405091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101273 + ... + 101276.

2⁴⁰⁵⁰⁹⁸ is an apocalyptic number.

405098 is a deficient number, since it is larger than the sum of its proper divisors (202552).

405098 is a wasteful number, since it uses less digits than its factorization.

405098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202551.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 405098 is about 636.4730944824. The cubic root of 405098 is about 73.9923293729.

It can be divided in two parts, 4050 and 98, that multiplied together give a square (396900 = 630²).

The spelling of 405098 in words is "four hundred five thousand, ninety-eight".