1212140 has 12 divisors (see below), whose sum is σ = 2545536. Its totient is φ = 484848.

The previous prime is 1212121. The next prime is 1212149. The reversal of 1212140 is 412121.

It is not an unprimeable number, because it can be changed into a prime (1212149) 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, 30284 + ... + 30323.

It is an arithmetic number, because the mean of its divisors is an integer number (212128).

2^1212140 is an apocalyptic number.

1212140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212140 is an abundant number, since it is smaller than the sum of its proper divisors (1333396).

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

1212140 is a wasteful number, since it uses less digits than its factorization.

1212140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60616 (or 60614 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212140 is about 1100.9722975625. The cubic root of 1212140 is about 106.6230073060.

Adding to 1212140 its reverse (412121), we get a palindrome (1624261).

The spelling of 1212140 in words is "one million, two hundred twelve thousand, one hundred forty".