1225229640 has 32 divisors (see below), whose sum is σ = 3675689280. Its totient is φ = 326727872.

The previous prime is 1225229617. The next prime is 1225229641. The reversal of 1225229640 is 469225221.

It is not an unprimeable number, because it can be changed into a prime (1225229641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5105004 + ... + 5105243.

It is an arithmetic number, because the mean of its divisors is an integer number (114865290).

Almost surely, 2^1225229640 is an apocalyptic number.

1225229640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225229640 is an abundant number, since it is smaller than the sum of its proper divisors (2450459640).

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

1225229640 is a wasteful number, since it uses less digits than its factorization.

1225229640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210261 (or 10210257 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1225229640 is about 35003.2804176980. The cubic root of 1225229640 is about 1070.0543367754.

The spelling of 1225229640 in words is "one billion, two hundred twenty-five million, two hundred twenty-nine thousand, six hundred forty".