1240236 has 36 divisors (see below), whose sum is σ = 3206112. Its totient is φ = 404064.

The previous prime is 1240231. The next prime is 1240241. The reversal of 1240236 is 6320421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1240231) and next prime (1240241).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1326 + ... + 2058.

2^1240236 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 1240236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603056).

1240236 is an abundant number, since it is smaller than the sum of its proper divisors (1965876).

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

1240236 is a wasteful number, since it uses less digits than its factorization.

1240236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1240236 is about 1113.6588346527. The cubic root of 1240236 is about 107.4405223533.

Adding to 1240236 its reverse (6320421), we get a palindrome (7560657).

The spelling of 1240236 in words is "one million, two hundred forty thousand, two hundred thirty-six".