1242428 has 36 divisors (see below), whose sum is σ = 2547216. Its totient is φ = 528000.

The previous prime is 1242421. The next prime is 1242457. The reversal of 1242428 is 8242421.

It is a happy number.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8153 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (70756).

2^1242428 is an apocalyptic number.

It is an amenable number.

1242428 is an abundant number, since it is smaller than the sum of its proper divisors (1304788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242428 is a wasteful number, since it uses less digits than its factorization.

1242428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 181 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

The square root of 1242428 is about 1114.6425435986. The cubic root of 1242428 is about 107.5037820916.

Adding to 1242428 its reverse (8242421), we get a palindrome (9484849).

It can be divided in two parts, 124 and 2428, that added together give a palindrome (2552).

The spelling of 1242428 in words is "one million, two hundred forty-two thousand, four hundred twenty-eight".