125586749 has 2 divisors, whose sum is σ = 125586750. Its totient is φ = 125586748.

The previous prime is 125586737. The next prime is 125586781. The reversal of 125586749 is 947685521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103327225 + 22259524 = 10165^2 + 4718^2 .

It is a cyclic number.

It is not a de Polignac number, because 125586749 - 2⁸ = 125586493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125586709) 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, 62793374 + 62793375.

It is an arithmetic number, because the mean of its divisors is an integer number (62793375).

Almost surely, 2^125586749 is an apocalyptic number.

It is an amenable number.

125586749 is a deficient number, since it is larger than the sum of its proper divisors (1).

125586749 is an equidigital number, since it uses as much as digits as its factorization.

125586749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 47.

The square root of 125586749 is about 11206.5493797154. The cubic root of 125586749 is about 500.7811110955.

The spelling of 125586749 in words is "one hundred twenty-five million, five hundred eighty-six thousand, seven hundred forty-nine".