1255105247 has 8 divisors (see below), whose sum is σ = 1369463760. Its totient is φ = 1140789760.

The previous prime is 1255105237. The next prime is 1255105301. The reversal of 1255105247 is 7425015521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1255105247 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 (1255105207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98879 + ... + 110847.

It is an arithmetic number, because the mean of its divisors is an integer number (171182970).

Almost surely, 2^1255105247 is an apocalyptic number.

1255105247 is a deficient number, since it is larger than the sum of its proper divisors (114358513).

1255105247 is a wasteful number, since it uses less digits than its factorization.

1255105247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21513.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 1255105247 is about 35427.4645861089. The cubic root of 1255105247 is about 1078.6818758425.

The spelling of 1255105247 in words is "one billion, two hundred fifty-five million, one hundred five thousand, two hundred forty-seven".