1200312 has 32 divisors (see below), whose sum is σ = 3334800. Its totient is φ = 400032.

The previous prime is 1200307. The next prime is 1200313. The reversal of 1200312 is 2130021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1200294 and 1200303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2563 + ... + 2994.

2^1200312 is an apocalyptic number.

1200312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200312 is an abundant number, since it is smaller than the sum of its proper divisors (2134488).

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

1200312 is a wasteful number, since it uses less digits than its factorization.

1200312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5572 (or 5562 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1200312 is about 1095.5875136200. The cubic root of 1200312 is about 106.2750658278.

Adding to 1200312 its reverse (2130021), we get a palindrome (3330333).

The spelling of 1200312 in words is "one million, two hundred thousand, three hundred twelve".