125692661 has 2 divisors, whose sum is σ = 125692662. Its totient is φ = 125692660.

The previous prime is 125692643. The next prime is 125692673. The reversal of 125692661 is 166296521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125664100 + 28561 = 11210^2 + 169^2 .

It is an emirp because it is prime and its reverse (166296521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125692661 - 2¹⁰ = 125691637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125692621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62846330 + 62846331.

It is an arithmetic number, because the mean of its divisors is an integer number (62846331).

Almost surely, 2^125692661 is an apocalyptic number.

It is an amenable number.

125692661 is a deficient number, since it is larger than the sum of its proper divisors (1).

125692661 is an equidigital number, since it uses as much as digits as its factorization.

125692661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 125692661 is about 11211.2738348503. The cubic root of 125692661 is about 500.9218473504.

The spelling of 125692661 in words is "one hundred twenty-five million, six hundred ninety-two thousand, six hundred sixty-one".