145238129 has 2 divisors, whose sum is σ = 145238130. Its totient is φ = 145238128.

The previous prime is 145238081. The next prime is 145238167. The reversal of 145238129 is 921832541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99540529 + 45697600 = 9977^2 + 6760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145238129 is a prime.

It is a super-2 number, since 2×145238129² = 42188228230841282, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145238189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72619064 + 72619065.

It is an arithmetic number, because the mean of its divisors is an integer number (72619065).

Almost surely, 2^145238129 is an apocalyptic number.

It is an amenable number.

145238129 is a deficient number, since it is larger than the sum of its proper divisors (1).

145238129 is an equidigital number, since it uses as much as digits as its factorization.

145238129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 145238129 is about 12051.4782910645. The cubic root of 145238129 is about 525.6462234348.

The spelling of 145238129 in words is "one hundred forty-five million, two hundred thirty-eight thousand, one hundred twenty-nine".