1255540201 has 2 divisors, whose sum is σ = 1255540202. Its totient is φ = 1255540200.

The previous prime is 1255540183. The next prime is 1255540211. The reversal of 1255540201 is 1020455521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1241857600 + 13682601 = 35240^2 + 3699^2 .

It is an emirp because it is prime and its reverse (1020455521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1255540201 - 2⁹ = 1255539689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255540211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627770100 + 627770101.

It is an arithmetic number, because the mean of its divisors is an integer number (627770101).

Almost surely, 2^1255540201 is an apocalyptic number.

It is an amenable number.

1255540201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255540201 is an equidigital number, since it uses as much as digits as its factorization.

1255540201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1255540201 is about 35433.6027098572. The cubic root of 1255540201 is about 1078.8064664059.

Adding to 1255540201 its reverse (1020455521), we get a palindrome (2275995722).

The spelling of 1255540201 in words is "one billion, two hundred fifty-five million, five hundred forty thousand, two hundred one".