1198761255 has 64 divisors (see below), whose sum is σ = 2222899200. Its totient is φ = 612178560.

The previous prime is 1198761241. The next prime is 1198761269. The reversal of 1198761255 is 5521678911.

It is an interprime number because it is at equal distance from previous prime (1198761241) and next prime (1198761269).

It is not a de Polignac number, because 1198761255 - 2¹⁰ = 1198760231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1198761255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 496000 + ... + 498410.

It is an arithmetic number, because the mean of its divisors is an integer number (34732800).

Almost surely, 2^1198761255 is an apocalyptic number.

1198761255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1198761255 is a deficient number, since it is larger than the sum of its proper divisors (1024137945).

1198761255 is a wasteful number, since it uses less digits than its factorization.

1198761255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581 (or 2575 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 1198761255 is about 34623.1317907552. The cubic root of 1198761255 is about 1062.2927869037.

The spelling of 1198761255 in words is "one billion, one hundred ninety-eight million, seven hundred sixty-one thousand, two hundred fifty-five".