125525261 has 2 divisors, whose sum is σ = 125525262. Its totient is φ = 125525260.

The previous prime is 125525219. The next prime is 125525327. The reversal of 125525261 is 162525521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 2869636 = 11075^2 + 1694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125525261 is a prime.

It is a super-2 number, since 2×125525261² = 31513182298236242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125522261) 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, 62762630 + 62762631.

It is an arithmetic number, because the mean of its divisors is an integer number (62762631).

Almost surely, 2^125525261 is an apocalyptic number.

It is an amenable number.

125525261 is a deficient number, since it is larger than the sum of its proper divisors (1).

125525261 is an equidigital number, since it uses as much as digits as its factorization.

125525261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 29.

The square root of 125525261 is about 11203.8056480823. The cubic root of 125525261 is about 500.6993693090.

The spelling of 125525261 in words is "one hundred twenty-five million, five hundred twenty-five thousand, two hundred sixty-one".