126564419 has 2 divisors, whose sum is σ = 126564420. Its totient is φ = 126564418.

The previous prime is 126564409. The next prime is 126564421. The reversal of 126564419 is 914465621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126564419 - 2²⁴ = 109787203 is a prime.

It is a super-2 number, since 2×126564419² = 32037104313615122, which contains 22 as substring.

Together with 126564421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126564409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63282209 + 63282210.

It is an arithmetic number, because the mean of its divisors is an integer number (63282210).

Almost surely, 2^126564419 is an apocalyptic number.

126564419 is a deficient number, since it is larger than the sum of its proper divisors (1).

126564419 is an equidigital number, since it uses as much as digits as its factorization.

126564419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 126564419 is about 11250.0852885656. The cubic root of 126564419 is about 502.0772501129.

The spelling of 126564419 in words is "one hundred twenty-six million, five hundred sixty-four thousand, four hundred nineteen".