1255102217 has 4 divisors (see below), whose sum is σ = 1255279380. Its totient is φ = 1254925056.

The previous prime is 1255102201. The next prime is 1255102253. The reversal of 1255102217 is 7122015521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7122015521 = 12577 ⋅566273.

It can be written as a sum of positive squares in 2 ways, for example, as 866066041 + 389036176 = 29429^2 + 19724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255102217 - 2⁴ = 1255102201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255104217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77492 + ... + 92277.

It is an arithmetic number, because the mean of its divisors is an integer number (313819845).

Almost surely, 2^1255102217 is an apocalyptic number.

It is an amenable number.

1255102217 is a deficient number, since it is larger than the sum of its proper divisors (177163).

1255102217 is an equidigital number, since it uses as much as digits as its factorization.

1255102217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177162.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 1255102217 is about 35427.4218226503. The cubic root of 1255102217 is about 1078.6810078120.

Adding to 1255102217 its reverse (7122015521), we get a palindrome (8377117738).

The spelling of 1255102217 in words is "one billion, two hundred fifty-five million, one hundred two thousand, two hundred seventeen".