1221252 has 12 divisors (see below), whose sum is σ = 2849616. Its totient is φ = 407080.

The previous prime is 1221251. The next prime is 1221289. The reversal of 1221252 is 2521221.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1221251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50874 + ... + 50897.

It is an arithmetic number, because the mean of its divisors is an integer number (237468).

2^1221252 is an apocalyptic number.

1221252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221252 is an abundant number, since it is smaller than the sum of its proper divisors (1628364).

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

1221252 is a wasteful number, since it uses less digits than its factorization.

1221252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101778 (or 101776 counting only the distinct ones).

The product of its digits is 80, while the sum is 15.

The square root of 1221252 is about 1105.1027101587. The cubic root of 1221252 is about 106.8895124098.

Adding to 1221252 its reverse (2521221), we get a palindrome (3742473).

The spelling of 1221252 in words is "one million, two hundred twenty-one thousand, two hundred fifty-two".