125136281 has 2 divisors, whose sum is σ = 125136282. Its totient is φ = 125136280.

The previous prime is 125136229. The next prime is 125136287. The reversal of 125136281 is 182631521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91030681 + 34105600 = 9541^2 + 5840^2 .

It is an emirp because it is prime and its reverse (182631521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125136281 - 2⁶ = 125136217 is a prime.

It is a super-2 number, since 2×125136281² = 31318177645021922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125136287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62568140 + 62568141.

It is an arithmetic number, because the mean of its divisors is an integer number (62568141).

Almost surely, 2^125136281 is an apocalyptic number.

It is an amenable number.

125136281 is a deficient number, since it is larger than the sum of its proper divisors (1).

125136281 is an equidigital number, since it uses as much as digits as its factorization.

125136281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 125136281 is about 11186.4328988288. The cubic root of 125136281 is about 500.1816420044.

The spelling of 125136281 in words is "one hundred twenty-five million, one hundred thirty-six thousand, two hundred eighty-one".