1253129266395 has 24 divisors (see below), whose sum is σ = 2172537031392. Its totient is φ = 668198284800.

The previous prime is 1253129266393. The next prime is 1253129266421. The reversal of 1253129266395 is 5936629213521.

1253129266395 is a `hidden beast` number, since 1 + 2 + 531 + 29 + 26 + 63 + 9 + 5 = 666.

It is not a de Polignac number, because 1253129266395 - 2¹ = 1253129266393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253129266391) 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, 2639286 + ... + 3077675.

It is an arithmetic number, because the mean of its divisors is an integer number (90522376308).

Almost surely, 2^{1253129266395} is an apocalyptic number.

1253129266395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1253129266395 is a deficient number, since it is larger than the sum of its proper divisors (919407764997).

1253129266395 is a wasteful number, since it uses less digits than its factorization.

1253129266395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721843 (or 5721840 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The spelling of 1253129266395 in words is "one trillion, two hundred fifty-three billion, one hundred twenty-nine million, two hundred sixty-six thousand, three hundred ninety-five".