125003861 has 2 divisors, whose sum is σ = 125003862. Its totient is φ = 125003860.

The previous prime is 125003821. The next prime is 125003887. The reversal of 125003861 is 168300521.

It is an a-pointer prime, because the next prime (125003887) can be obtained adding 125003861 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79103236 + 45900625 = 8894^2 + 6775^2 .

It is an emirp because it is prime and its reverse (168300521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125003861 - 2¹⁰ = 125002837 is a prime.

It is a Chen prime.

125003861 is a modest number, since divided by 3861 gives 125 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 125003861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125003821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62501930 + 62501931.

It is an arithmetic number, because the mean of its divisors is an integer number (62501931).

Almost surely, 2^125003861 is an apocalyptic number.

It is an amenable number.

125003861 is a deficient number, since it is larger than the sum of its proper divisors (1).

125003861 is an equidigital number, since it uses as much as digits as its factorization.

125003861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 125003861 is about 11180.5125553348. The cubic root of 125003861 is about 500.0051479470.

It can be divided in two parts, 12500 and 3861, that added together give a palindrome (16361).

The spelling of 125003861 in words is "one hundred twenty-five million, three thousand, eight hundred sixty-one".