1255469191 has 4 divisors (see below), whose sum is σ = 1310054832. Its totient is φ = 1200883552.

The previous prime is 1255469113. The next prime is 1255469197. The reversal of 1255469191 is 1919645521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255469191 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 (1255469197) 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, 27292786 + ... + 27292831.

It is an arithmetic number, because the mean of its divisors is an integer number (327513708).

Almost surely, 2^1255469191 is an apocalyptic number.

1255469191 is a deficient number, since it is larger than the sum of its proper divisors (54585641).

1255469191 is an equidigital number, since it uses as much as digits as its factorization.

1255469191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54585640.

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

The square root of 1255469191 is about 35432.6006807290. The cubic root of 1255469191 is about 1078.7861278851.

The spelling of 1255469191 in words is "one billion, two hundred fifty-five million, four hundred sixty-nine thousand, one hundred ninety-one".