126005623 has 2 divisors, whose sum is σ = 126005624. Its totient is φ = 126005622.

The previous prime is 126005611. The next prime is 126005629. The reversal of 126005623 is 326500621.

It is a strong prime.

It is an emirp because it is prime and its reverse (326500621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126005623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126005629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63002811 + 63002812.

It is an arithmetic number, because the mean of its divisors is an integer number (63002812).

Almost surely, 2^126005623 is an apocalyptic number.

126005623 is a deficient number, since it is larger than the sum of its proper divisors (1).

126005623 is an equidigital number, since it uses as much as digits as its factorization.

126005623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 126005623 is about 11225.2226258547. Note that the first 3 decimals coincide. The cubic root of 126005623 is about 501.3372509978.

The spelling of 126005623 in words is "one hundred twenty-six million, five thousand, six hundred twenty-three".