126565249 has 2 divisors, whose sum is σ = 126565250. Its totient is φ = 126565248.

The previous prime is 126565181. The next prime is 126565253. The reversal of 126565249 is 942565621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72982849 + 53582400 = 8543^2 + 7320^2 .

It is a cyclic number.

It is not a de Polignac number, because 126565249 - 2¹⁷ = 126434177 is a prime.

It is not a weakly prime, because it can be changed into another prime (126565259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63282624 + 63282625.

It is an arithmetic number, because the mean of its divisors is an integer number (63282625).

Almost surely, 2^126565249 is an apocalyptic number.

It is an amenable number.

126565249 is a deficient number, since it is larger than the sum of its proper divisors (1).

126565249 is an equidigital number, since it uses as much as digits as its factorization.

126565249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 126565249 is about 11250.1221771143. The cubic root of 126565249 is about 502.0783476389.

The spelling of 126565249 in words is "one hundred twenty-six million, five hundred sixty-five thousand, two hundred forty-nine".