1242836 has 36 divisors (see below), whose sum is σ = 2686068. Its totient is φ = 499968.

The previous prime is 1242827. The next prime is 1242841. The reversal of 1242836 is 6382421.

It can be written as a sum of positive squares in 2 ways, for example, as 828100 + 414736 = 910^2 + 644^2 .

It is a d-powerful number, because it can be written as 1 + 2¹⁹ + 4⁷ + 2¹⁹ + 8³ + 3¹¹ + 6³ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3146 + ... + 3518.

It is an arithmetic number, because the mean of its divisors is an integer number (74613).

2^1242836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343034).

1242836 is an abundant number, since it is smaller than the sum of its proper divisors (1443232).

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

1242836 is a wasteful number, since it uses less digits than its factorization.

1242836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 399 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 1242836 is about 1114.8255468906. The cubic root of 1242836 is about 107.5155484992.

The spelling of 1242836 in words is "one million, two hundred forty-two thousand, eight hundred thirty-six".