1265126375 has 16 divisors (see below), whose sum is σ = 1591329792. Its totient is φ = 1004119200.

The previous prime is 1265126371. The next prime is 1265126389. The reversal of 1265126375 is 5736215621.

It is a happy number.

It is not a de Polignac number, because 1265126375 - 2² = 1265126371 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 (1265126371) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23972 + ... + 55721.

It is an arithmetic number, because the mean of its divisors is an integer number (99458112).

Almost surely, 2^1265126375 is an apocalyptic number.

1265126375 is a deficient number, since it is larger than the sum of its proper divisors (326203417).

1265126375 is an equidigital number, since it uses as much as digits as its factorization.

1265126375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79835 (or 79825 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The square root of 1265126375 is about 35568.6150278585. The cubic root of 1265126375 is about 1081.5451063915.

The spelling of 1265126375 in words is "one billion, two hundred sixty-five million, one hundred twenty-six thousand, three hundred seventy-five".