1240506 has 12 divisors (see below), whose sum is σ = 2687802. Its totient is φ = 413496.

The previous prime is 1240487. The next prime is 1240511. The reversal of 1240506 is 6050421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1121481 + 119025 = 1059^2 + 345^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 68917 = 1240506 / (1 + 2 + 4 + 0 + 5 + 0 + 6).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34441 + ... + 34476.

2^1240506 is an apocalyptic number.

1240506 is an abundant number, since it is smaller than the sum of its proper divisors (1447296).

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

1240506 is a wasteful number, since it uses less digits than its factorization.

1240506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68925 (or 68922 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1240506 is about 1113.7800500997. The cubic root of 1240506 is about 107.4483184062.

Adding to 1240506 its reverse (6050421), we get a palindrome (7290927).

The spelling of 1240506 in words is "one million, two hundred forty thousand, five hundred six".