1240556 has 12 divisors (see below), whose sum is σ = 2178792. Its totient is φ = 618048.

The previous prime is 1240553. The next prime is 1240559. The reversal of 1240556 is 6550421.

It is an interprime number because it is at equal distance from previous prime (1240553) and next prime (1240559).

It is not an unprimeable number, because it can be changed into a prime (1240553) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1796 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (181566).

2^1240556 is an apocalyptic number.

It is an amenable number.

1240556 is a deficient number, since it is larger than the sum of its proper divisors (938236).

1240556 is a wasteful number, since it uses less digits than its factorization.

1240556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1240556 is about 1113.8024959570. The cubic root of 1240556 is about 107.4497619955.

Adding to 1240556 its reverse (6550421), we get a palindrome (7790977).

The spelling of 1240556 in words is "one million, two hundred forty thousand, five hundred fifty-six".