125534209 has 2 divisors, whose sum is σ = 125534210. Its totient is φ = 125534208.

The previous prime is 125534183. The next prime is 125534261. The reversal of 125534209 is 902435521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 6615184 = 10905^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 125534209 - 2¹¹ = 125532161 is a prime.

It is not a weakly prime, because it can be changed into another prime (125534309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62767104 + 62767105.

It is an arithmetic number, because the mean of its divisors is an integer number (62767105).

It is a Proth number, since it is equal to 3831 ⋅ 2¹⁵ + 1 and 3831 < 2¹⁵.

Almost surely, 2^125534209 is an apocalyptic number.

It is an amenable number.

125534209 is a deficient number, since it is larger than the sum of its proper divisors (1).

125534209 is an equidigital number, since it uses as much as digits as its factorization.

125534209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 125534209 is about 11204.2049695639. The cubic root of 125534209 is about 500.7112663871.

The spelling of 125534209 in words is "one hundred twenty-five million, five hundred thirty-four thousand, two hundred nine".