1240312 has 16 divisors (see below), whose sum is σ = 2340360. Its totient is φ = 616224.

The previous prime is 1240307. The next prime is 1240319. The reversal of 1240312 is 2130421.

It is a junction number, because it is equal to n+sod(n) for n = 1240292 and 1240301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240319) 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, 1183 + ... + 1969.

2^1240312 is an apocalyptic number.

It is an amenable number.

1240312 is a deficient number, since it is larger than the sum of its proper divisors (1100048).

1240312 is a wasteful number, since it uses less digits than its factorization.

1240312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1240312 is about 1113.6929558904. The cubic root of 1240312 is about 107.4427169123.

Adding to 1240312 its reverse (2130421), we get a palindrome (3370733).

The spelling of 1240312 in words is "one million, two hundred forty thousand, three hundred twelve".