125107261 has 2 divisors, whose sum is σ = 125107262. Its totient is φ = 125107260.

The previous prime is 125107243. The next prime is 125107273. The reversal of 125107261 is 162701521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115992900 + 9114361 = 10770^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 125107261 - 2⁷ = 125107133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125107201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62553630 + 62553631.

It is an arithmetic number, because the mean of its divisors is an integer number (62553631).

Almost surely, 2^125107261 is an apocalyptic number.

It is an amenable number.

125107261 is a deficient number, since it is larger than the sum of its proper divisors (1).

125107261 is an equidigital number, since it uses as much as digits as its factorization.

125107261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 125107261 is about 11185.1357166554. The cubic root of 125107261 is about 500.1429737798.

Adding to 125107261 its reverse (162701521), we get a palindrome (287808782).

The spelling of 125107261 in words is "one hundred twenty-five million, one hundred seven thousand, two hundred sixty-one".