1298391275 has 6 divisors (see below), whose sum is σ = 1610005212. Its totient is φ = 1038713000.

The previous prime is 1298391247. The next prime is 1298391301. The reversal of 1298391275 is 5721938921.

It is a happy number.

It is not a de Polignac number, because 1298391275 - 2¹² = 1298387179 is a prime.

It is a super-2 number, since 2×1298391275² = 3371639805992251250, which contains 22 as substring.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 25967801 + ... + 25967850.

It is an arithmetic number, because the mean of its divisors is an integer number (268334202).

Almost surely, 2^1298391275 is an apocalyptic number.

1298391275 is a deficient number, since it is larger than the sum of its proper divisors (311613937).

1298391275 is an equidigital number, since it uses as much as digits as its factorization.

1298391275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51935661 (or 51935656 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The square root of 1298391275 is about 36033.1968467967. The cubic root of 1298391275 is about 1090.9425046636.

The spelling of 1298391275 in words is "one billion, two hundred ninety-eight million, three hundred ninety-one thousand, two hundred seventy-five".