129424027 has 2 divisors, whose sum is σ = 129424028. Its totient is φ = 129424026.

The previous prime is 129424007. The next prime is 129424051. The reversal of 129424027 is 720424921.

It is a weak prime.

It is an emirp because it is prime and its reverse (720424921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129424027 - 2¹¹ = 129421979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129424027.

It is not a weakly prime, because it can be changed into another prime (129424007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64712013 + 64712014.

It is an arithmetic number, because the mean of its divisors is an integer number (64712014).

Almost surely, 2^129424027 is an apocalyptic number.

129424027 is a deficient number, since it is larger than the sum of its proper divisors (1).

129424027 is an equidigital number, since it uses as much as digits as its factorization.

129424027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 129424027 is about 11376.4681250378. The cubic root of 129424027 is about 505.8304501016.

Adding to 129424027 its reverse (720424921), we get a palindrome (849848948).

The spelling of 129424027 in words is "one hundred twenty-nine million, four hundred twenty-four thousand, twenty-seven".