125570749 has 2 divisors, whose sum is σ = 125570750. Its totient is φ = 125570748.

The previous prime is 125570747. The next prime is 125570759. The reversal of 125570749 is 947075521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105945849 + 19624900 = 10293^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 125570749 - 2¹ = 125570747 is a prime.

Together with 125570747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125570743) 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, 62785374 + 62785375.

It is an arithmetic number, because the mean of its divisors is an integer number (62785375).

Almost surely, 2^125570749 is an apocalyptic number.

It is an amenable number.

125570749 is a deficient number, since it is larger than the sum of its proper divisors (1).

125570749 is an equidigital number, since it uses as much as digits as its factorization.

125570749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 125570749 is about 11205.8354887086. The cubic root of 125570749 is about 500.7598433579.

The spelling of 125570749 in words is "one hundred twenty-five million, five hundred seventy thousand, seven hundred forty-nine".