404242 has 4 divisors (see below), whose sum is σ = 606366. Its totient is φ = 202120.

The previous prime is 404221. The next prime is 404249. The reversal of 404242 is 242404.

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., 259081 + 145161 = 509^2 + 381^2 .

It is not an unprimeable number, because it can be changed into a prime (404249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101059 + ... + 101062.

2⁴⁰⁴²⁴² is an apocalyptic number.

404242 is a deficient number, since it is larger than the sum of its proper divisors (202124).

404242 is a wasteful number, since it uses less digits than its factorization.

404242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202123.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 404242 is about 635.8002831078. The cubic root of 404242 is about 73.9401756566.

Adding to 404242 its reverse (242404), we get a palindrome (646646).

It can be divided in two parts, 404 and 242, that added together give a palindrome (646).

The spelling of 404242 in words is "four hundred four thousand, two hundred forty-two", and thus it is an iban number.