1240156 has 12 divisors (see below), whose sum is σ = 2245320. Its totient is φ = 598640.

The previous prime is 1240153. The next prime is 1240159. The reversal of 1240156 is 6510421.

It is an interprime number because it is at equal distance from previous prime (1240153) and next prime (1240159).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240153) 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 3 ways as a sum of consecutive naturals, for example, 5230 + ... + 5461.

It is an arithmetic number, because the mean of its divisors is an integer number (187110).

2^1240156 is an apocalyptic number.

It is an amenable number.

1240156 is a deficient number, since it is larger than the sum of its proper divisors (1005164).

1240156 is a wasteful number, since it uses less digits than its factorization.

1240156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10724 (or 10722 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1240156 is about 1113.6229164309. The cubic root of 1240156 is about 107.4382121945.

Adding to 1240156 its reverse (6510421), we get a palindrome (7750577).

The spelling of 1240156 in words is "one million, two hundred forty thousand, one hundred fifty-six".