1240636 has 12 divisors (see below), whose sum is σ = 2221912. Its totient is φ = 605808.

The previous prime is 1240621. The next prime is 1240637. The reversal of 1240636 is 6360421.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3435 + ... + 3778.

2^1240636 is an apocalyptic number.

It is an amenable number.

1240636 is a deficient number, since it is larger than the sum of its proper divisors (981276).

1240636 is a wasteful number, since it uses less digits than its factorization.

1240636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7260 (or 7258 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1240636 is about 1113.8384083879. The cubic root of 1240636 is about 107.4520716578.

The spelling of 1240636 in words is "one million, two hundred forty thousand, six hundred thirty-six".