126565487 has 2 divisors, whose sum is σ = 126565488. Its totient is φ = 126565486.

The previous prime is 126565457. The next prime is 126565489. The reversal of 126565487 is 784565621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126565487 is a prime.

It is a super-4 number, since 4×126565487⁴ (a number of 34 digits) contains 4444 as substring.

Together with 126565489, 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 (126565489) 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, 63282743 + 63282744.

It is an arithmetic number, because the mean of its divisors is an integer number (63282744).

Almost surely, 2^126565487 is an apocalyptic number.

126565487 is a deficient number, since it is larger than the sum of its proper divisors (1).

126565487 is an equidigital number, since it uses as much as digits as its factorization.

126565487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 44.

The square root of 126565487 is about 11250.1327547723. The cubic root of 126565487 is about 502.0786623503.

The spelling of 126565487 in words is "one hundred twenty-six million, five hundred sixty-five thousand, four hundred eighty-seven".