428242 has 8 divisors (see below), whose sum is σ = 645516. Its totient is φ = 213072.

The previous prime is 428231. The next prime is 428249. The reversal of 428242 is 242824.

428242 is nontrivially palindromic in base 7.

428242 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 349281 + 78961 = 591^2 + 281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×428242⁴ (a number of 24 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (428249) by changing a digit.

428242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168 + ... + 940.

2⁴²⁸²⁴² is an apocalyptic number.

428242 is a deficient number, since it is larger than the sum of its proper divisors (217274).

428242 is a wasteful number, since it uses less digits than its factorization.

428242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its digits is 1024, while the sum is 22.

The square root of 428242 is about 654.4020171118. The cubic root of 428242 is about 75.3754213523.

The spelling of 428242 in words is "four hundred twenty-eight thousand, two hundred forty-two".