1298791755 has 24 divisors (see below), whose sum is σ = 2383666272. Its totient is φ = 651942144.

The previous prime is 1298791751. The next prime is 1298791799. The reversal of 1298791755 is 5571978921.

It is not a de Polignac number, because 1298791755 - 2² = 1298791751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1298791751) 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 23 ways as a sum of consecutive naturals, for example, 848119 + ... + 849648.

It is an arithmetic number, because the mean of its divisors is an integer number (99319428).

Almost surely, 2^1298791755 is an apocalyptic number.

1298791755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1298791755 is a deficient number, since it is larger than the sum of its proper divisors (1084874517).

1298791755 is a wasteful number, since it uses less digits than its factorization.

1298791755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697795 (or 1697792 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 54.

The square root of 1298791755 is about 36038.7535161803. The cubic root of 1298791755 is about 1091.0546577438.

The spelling of 1298791755 in words is "one billion, two hundred ninety-eight million, seven hundred ninety-one thousand, seven hundred fifty-five".