1223397252 has 144 divisors (see below), whose sum is σ = 3891888000. Its totient is φ = 314772480.

The previous prime is 1223397221. The next prime is 1223397269. The reversal of 1223397252 is 2527933221.

It is a happy number.

1223397252 is a `hidden beast` number, since 12 + 2 + 3 + 397 + 252 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 300124 + ... + 304172.

It is an arithmetic number, because the mean of its divisors is an integer number (27027000).

Almost surely, 2^1223397252 is an apocalyptic number.

1223397252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223397252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1945944000).

1223397252 is an abundant number, since it is smaller than the sum of its proper divisors (2668490748).

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

1223397252 is a wasteful number, since it uses less digits than its factorization.

1223397252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186 (or 4181 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 1223397252 is about 34977.0961058805. The cubic root of 1223397252 is about 1069.5206319248.

The spelling of 1223397252 in words is "one billion, two hundred twenty-three million, three hundred ninety-seven thousand, two hundred fifty-two".