1212345225 has 336 divisors, whose sum is σ = 3005557632. Its totient is φ = 470292480.

The previous prime is 1212345143. The next prime is 1212345257. The reversal of 1212345225 is 5225432121.

1212345225 is a `hidden beast` number, since 12 + 123 + 4 + 522 + 5 = 666.

It is not a de Polignac number, because 1212345225 - 2⁷ = 1212345097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 335 ways as a sum of consecutive naturals, for example, 28194054 + ... + 28194096.

It is an arithmetic number, because the mean of its divisors is an integer number (8945112).

Almost surely, 2^1212345225 is an apocalyptic number.

1212345225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212345225 is an abundant number, since it is smaller than the sum of its proper divisors (1793212407).

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

1212345225 is a wasteful number, since it uses less digits than its factorization.

1212345225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 88 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1212345225 is about 34818.7481825525. The cubic root of 1212345225 is about 1066.2902434249.

Adding to 1212345225 its reverse (5225432121), we get a palindrome (6437777346).

The spelling of 1212345225 in words is "one billion, two hundred twelve million, three hundred forty-five thousand, two hundred twenty-five".