1225405555 has 16 divisors (see below), whose sum is σ = 1610427744. Its totient is φ = 887726080.

The previous prime is 1225405549. The next prime is 1225405607. The reversal of 1225405555 is 5555045221.

It is not a de Polignac number, because 1225405555 - 2²⁹ = 688534643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225405555.

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 15 ways as a sum of consecutive naturals, for example, 29212 + ... + 57481.

It is an arithmetic number, because the mean of its divisors is an integer number (100651734).

Almost surely, 2^1225405555 is an apocalyptic number.

1225405555 is a deficient number, since it is larger than the sum of its proper divisors (385022189).

1225405555 is a wasteful number, since it uses less digits than its factorization.

1225405555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86966.

The product of its (nonzero) digits is 50000, while the sum is 34.

The square root of 1225405555 is about 35005.7931634180. The cubic root of 1225405555 is about 1070.1055461145.

The spelling of 1225405555 in words is "one billion, two hundred twenty-five million, four hundred five thousand, five hundred fifty-five".