125841257149 has 2 divisors, whose sum is σ = 125841257150. Its totient is φ = 125841257148.

The previous prime is 125841257137. The next prime is 125841257189. The reversal of 125841257149 is 941752148521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111562680100 + 14278577049 = 334010^2 + 119493^2 .

It is an emirp because it is prime and its reverse (941752148521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125841257149 - 2¹¹ = 125841255101 is a prime.

It is a super-4 number, since 4×125841257149⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125841257189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62920628574 + 62920628575.

It is an arithmetic number, because the mean of its divisors is an integer number (62920628575).

Almost surely, 2^125841257149 is an apocalyptic number.

It is an amenable number.

125841257149 is a deficient number, since it is larger than the sum of its proper divisors (1).

125841257149 is an equidigital number, since it uses as much as digits as its factorization.

125841257149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 49.

The spelling of 125841257149 in words is "one hundred twenty-five billion, eight hundred forty-one million, two hundred fifty-seven thousand, one hundred forty-nine".