1225554312 has 32 divisors (see below), whose sum is σ = 3064891680. Its totient is φ = 408384000.

The previous prime is 1225554277. The next prime is 1225554331. The reversal of 1225554312 is 2134555221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225554312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89643 + ... + 102405.

It is an arithmetic number, because the mean of its divisors is an integer number (95777865).

Almost surely, 2^1225554312 is an apocalyptic number.

1225554312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225554312 is an abundant number, since it is smaller than the sum of its proper divisors (1839337368).

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

1225554312 is a wasteful number, since it uses less digits than its factorization.

1225554312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773 (or 16769 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 1225554312 is about 35007.9178472528. The cubic root of 1225554312 is about 1070.1488458610.

Subtracting 1225554312 from its reverse (2134555221), we obtain a palindrome (909000909).

The spelling of 1225554312 in words is "one billion, two hundred twenty-five million, five hundred fifty-four thousand, three hundred twelve".