1255469911 has 4 divisors (see below), whose sum is σ = 1255548112. Its totient is φ = 1255391712.

The previous prime is 1255469893. The next prime is 1255469921. The reversal of 1255469911 is 1199645521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1199645521 = 5381 ⋅222941.

It is a cyclic number.

It is not a de Polignac number, because 1255469911 - 2¹⁵ = 1255437143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255469921) 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, 5250 + ... + 50383.

It is an arithmetic number, because the mean of its divisors is an integer number (313887028).

Almost surely, 2^1255469911 is an apocalyptic number.

1255469911 is a deficient number, since it is larger than the sum of its proper divisors (78201).

1255469911 is an equidigital number, since it uses as much as digits as its factorization.

1255469911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78200.

The product of its digits is 97200, while the sum is 43.

The square root of 1255469911 is about 35432.6108408624. The cubic root of 1255469911 is about 1078.7863341097.

The spelling of 1255469911 in words is "one billion, two hundred fifty-five million, four hundred sixty-nine thousand, nine hundred eleven".