125340661 has 2 divisors, whose sum is σ = 125340662. Its totient is φ = 125340660.

The previous prime is 125340653. The next prime is 125340667. The reversal of 125340661 is 166043521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103428900 + 21911761 = 10170^2 + 4681^2 .

It is a cyclic number.

It is not a de Polignac number, because 125340661 - 2³ = 125340653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125340667) 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, 62670330 + 62670331.

It is an arithmetic number, because the mean of its divisors is an integer number (62670331).

Almost surely, 2^125340661 is an apocalyptic number.

It is an amenable number.

125340661 is a deficient number, since it is larger than the sum of its proper divisors (1).

125340661 is an equidigital number, since it uses as much as digits as its factorization.

125340661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 125340661 is about 11195.5643448644. The cubic root of 125340661 is about 500.4538026683.

It can be divided in two parts, 1253 and 40661, that added together give a palindrome (41914).

The spelling of 125340661 in words is "one hundred twenty-five million, three hundred forty thousand, six hundred sixty-one".