1261342375 has 8 divisors (see below), whose sum is σ = 1574155440. Its totient is φ = 1009073800.

The previous prime is 1261342367. The next prime is 1261342427. The reversal of 1261342375 is 5732431621.

It is not a de Polignac number, because 1261342375 - 2³ = 1261342367 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1261342375.

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 7 ways as a sum of consecutive naturals, for example, 5045245 + ... + 5045494.

It is an arithmetic number, because the mean of its divisors is an integer number (196769430).

Almost surely, 2^1261342375 is an apocalyptic number.

1261342375 is a deficient number, since it is larger than the sum of its proper divisors (312813065).

1261342375 is an equidigital number, since it uses as much as digits as its factorization.

1261342375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10090754 (or 10090744 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 1261342375 is about 35515.3822308025. The cubic root of 1261342375 is about 1080.4657270626.

Adding to 1261342375 its reverse (5732431621), we get a palindrome (6993773996).

The spelling of 1261342375 in words is "one billion, two hundred sixty-one million, three hundred forty-two thousand, three hundred seventy-five".