125224661 has 2 divisors, whose sum is σ = 125224662. Its totient is φ = 125224660.

The previous prime is 125224597. The next prime is 125224663. The reversal of 125224661 is 166422521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77545636 + 47679025 = 8806^2 + 6905^2 .

It is a cyclic number.

It is not a de Polignac number, because 125224661 - 2⁶ = 125224597 is a prime.

Together with 125224663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125224663) 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, 62612330 + 62612331.

It is an arithmetic number, because the mean of its divisors is an integer number (62612331).

Almost surely, 2^125224661 is an apocalyptic number.

It is an amenable number.

125224661 is a deficient number, since it is larger than the sum of its proper divisors (1).

125224661 is an equidigital number, since it uses as much as digits as its factorization.

125224661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 125224661 is about 11190.3825225057. The cubic root of 125224661 is about 500.2993687210.

The spelling of 125224661 in words is "one hundred twenty-five million, two hundred twenty-four thousand, six hundred sixty-one".