1212340 has 12 divisors (see below), whose sum is σ = 2545956. Its totient is φ = 484928.

The previous prime is 1212331. The next prime is 1212347. The reversal of 1212340 is 432121.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 976144 = 486^2 + 988^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212347) 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, 30289 + ... + 30328.

It is an arithmetic number, because the mean of its divisors is an integer number (212163).

2^1212340 is an apocalyptic number.

1212340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212340 is an abundant number, since it is smaller than the sum of its proper divisors (1333616).

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

1212340 is a wasteful number, since it uses less digits than its factorization.

1212340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60626 (or 60624 counting only the distinct ones).

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

The square root of 1212340 is about 1101.0631226229. The cubic root of 1212340 is about 106.6288711580.

Adding to 1212340 its reverse (432121), we get a palindrome (1644461).

The spelling of 1212340 in words is "one million, two hundred twelve thousand, three hundred forty".