1240836 has 24 divisors (see below), whose sum is σ = 2951424. Its totient is φ = 405600.

The previous prime is 1240831. The next prime is 1240859. The reversal of 1240836 is 6380421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1240831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (122976).

2^1240836 is an apocalyptic number.

It is an amenable number.

1240836 is an abundant number, since it is smaller than the sum of its proper divisors (1710588).

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

1240836 is a wasteful number, since it uses less digits than its factorization.

1240836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1240836 is about 1113.9281843997. The cubic root of 1240836 is about 107.4578453792.

The spelling of 1240836 in words is "one million, two hundred forty thousand, eight hundred thirty-six".