1212253200 has 360 divisors, whose sum is σ = 4557446400. Its totient is φ = 297354240.

The previous prime is 1212253169. The next prime is 1212253223. The reversal of 1212253200 is 23522121.

1212253200 is a `hidden beast` number, since 1 + 212 + 253 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 2530561 + ... + 2531039.

Almost surely, 2^1212253200 is an apocalyptic number.

1212253200 is a gapful number since it is divisible by the number (10) 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 1212253200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2278723200).

1212253200 is an abundant number, since it is smaller than the sum of its proper divisors (3345193200).

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

1212253200 is a wasteful number, since it uses less digits than its factorization.

1212253200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1212253200 is about 34817.4266711370. The cubic root of 1212253200 is about 1066.2632632544.

Adding to 1212253200 its reverse (23522121), we get a palindrome (1235775321).

The spelling of 1212253200 in words is "one billion, two hundred twelve million, two hundred fifty-three thousand, two hundred".