145258129 has 4 divisors (see below), whose sum is σ = 150267060. Its totient is φ = 140249200.

The previous prime is 145258123. The next prime is 145258151. The reversal of 145258129 is 921852541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921852541 = 73 ⋅12628117.

It can be written as a sum of positive squares in 2 ways, for example, as 66048129 + 79210000 = 8127^2 + 8900^2 .

It is a cyclic number.

It is not a de Polignac number, because 145258129 - 2⁹ = 145257617 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145258123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2504422 + ... + 2504479.

It is an arithmetic number, because the mean of its divisors is an integer number (37566765).

Almost surely, 2^145258129 is an apocalyptic number.

It is an amenable number.

145258129 is a deficient number, since it is larger than the sum of its proper divisors (5008931).

145258129 is an equidigital number, since it uses as much as digits as its factorization.

145258129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5008930.

The product of its digits is 28800, while the sum is 37.

The square root of 145258129 is about 12052.3080362228. The cubic root of 145258129 is about 525.6703503452.

The spelling of 145258129 in words is "one hundred forty-five million, two hundred fifty-eight thousand, one hundred twenty-nine".