1225356912 has 60 divisors (see below), whose sum is σ = 3693095224. Its totient is φ = 377032320.

The previous prime is 1225356887. The next prime is 1225356919. The reversal of 1225356912 is 2196535221.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225356919) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 325414 + ... + 329157.

Almost surely, 2^1225356912 is an apocalyptic number.

1225356912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225356912 is an abundant number, since it is smaller than the sum of its proper divisors (2467738312).

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

1225356912 is a wasteful number, since it uses less digits than its factorization.

1225356912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654598 (or 654589 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1225356912 is about 35005.0983715230. The cubic root of 1225356912 is about 1070.0913864940.

The spelling of 1225356912 in words is "one billion, two hundred twenty-five million, three hundred fifty-six thousand, nine hundred twelve".