125862101268521 has 4 divisors (see below), whose sum is σ = 126767584011600. Its totient is φ = 124956618525444.

The previous prime is 125862101268511. The next prime is 125862101268529.

125862101268521 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125862101268521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125862101268521.

It is not an unprimeable number, because it can be changed into a prime (125862101268529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452741371331 + ... + 452741371608.

It is an arithmetic number, because the mean of its divisors is an integer number (31691896002900).

Almost surely, 2^{125862101268521} is an apocalyptic number.

It is an amenable number.

125862101268521 is a deficient number, since it is larger than the sum of its proper divisors (905482743079).

125862101268521 is an equidigital number, since it uses as much as digits as its factorization.

125862101268521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905482743078.

The product of its (nonzero) digits is 921600, while the sum is 50.

The spelling of 125862101268521 in words is "one hundred twenty-five trillion, eight hundred sixty-two billion, one hundred one million, two hundred sixty-eight thousand, five hundred twenty-one".