125872486781 has 4 divisors (see below), whose sum is σ = 125874919872. Its totient is φ = 125870053692.

The previous prime is 125872486739. The next prime is 125872486787. The reversal of 125872486781 is 187684278521.

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 not a de Polignac number, because 125872486781 - 2⁶ = 125872486717 is a prime.

It is a super-2 number, since 2×125872486781² (a number of 23 digits) contains 22 as substring.

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 125872486781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125872486787) 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, 1137221 + ... + 1242986.

It is an arithmetic number, because the mean of its divisors is an integer number (31468729968).

Almost surely, 2^125872486781 is an apocalyptic number.

It is an amenable number.

125872486781 is a deficient number, since it is larger than the sum of its proper divisors (2433091).

125872486781 is an equidigital number, since it uses as much as digits as its factorization.

125872486781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433090.

The product of its digits is 12042240, while the sum is 59.

The spelling of 125872486781 in words is "one hundred twenty-five billion, eight hundred seventy-two million, four hundred eighty-six thousand, seven hundred eighty-one".