1225212 has 12 divisors (see below), whose sum is σ = 2858856. Its totient is φ = 408400.

The previous prime is 1225183. The next prime is 1225219. The reversal of 1225212 is 2125221.

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

It is a super-2 number, since 2×1225212² = 3002288889888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1225191 and 1225200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225219) 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, 51039 + ... + 51062.

It is an arithmetic number, because the mean of its divisors is an integer number (238238).

2^1225212 is an apocalyptic number.

1225212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225212 is an abundant number, since it is smaller than the sum of its proper divisors (1633644).

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

1225212 is a wasteful number, since it uses less digits than its factorization.

1225212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102108 (or 102106 counting only the distinct ones).

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

The square root of 1225212 is about 1106.8929487534. The cubic root of 1225212 is about 107.0049201453.

Subtracting 1225212 from its reverse (2125221), we obtain a palindrome (900009).

The spelling of 1225212 in words is "one million, two hundred twenty-five thousand, two hundred twelve".