1255540505 has 16 divisors (see below), whose sum is σ = 1529844624. Its totient is φ = 989015040.

The previous prime is 1255540493. The next prime is 1255540511. The reversal of 1255540505 is 5050455521.

It can be written as a sum of positive squares in 8 ways, for example, as 16289296 + 1239251209 = 4036^2 + 35203^2 .

It is not a de Polignac number, because 1255540505 - 2⁶ = 1255540441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244565 + ... + 249645.

It is an arithmetic number, because the mean of its divisors is an integer number (95615289).

Almost surely, 2^1255540505 is an apocalyptic number.

It is an amenable number.

1255540505 is a deficient number, since it is larger than the sum of its proper divisors (274304119).

1255540505 is an equidigital number, since it uses as much as digits as its factorization.

1255540505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836.

The product of its (nonzero) digits is 25000, while the sum is 32.

The square root of 1255540505 is about 35433.6069995703. The cubic root of 1255540505 is about 1078.8065534752.

The spelling of 1255540505 in words is "one billion, two hundred fifty-five million, five hundred forty thousand, five hundred five".