1242828 has 72 divisors (see below), whose sum is σ = 3494400. Its totient is φ = 370656.

The previous prime is 1242827. The next prime is 1242841. The reversal of 1242828 is 8282421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15693 + ... + 15771.

2^1242828 is an apocalyptic number.

1242828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747200).

1242828 is an abundant number, since it is smaller than the sum of its proper divisors (2251572).

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

1242828 is a wasteful number, since it uses less digits than its factorization.

1242828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 126 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 1242828 is about 1114.8219588795. The cubic root of 1242828 is about 107.5153178100.

The spelling of 1242828 in words is "one million, two hundred forty-two thousand, eight hundred twenty-eight".