145132805 has 4 divisors (see below), whose sum is σ = 174159372. Its totient is φ = 116106240.

The previous prime is 145132789. The next prime is 145132817. The reversal of 145132805 is 508231541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508231541 = 17 ⋅29895973.

It can be written as a sum of positive squares in 2 ways, for example, as 73239364 + 71893441 = 8558^2 + 8479^2 .

It is not a de Polignac number, because 145132805 - 2⁴ = 145132789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14513276 + ... + 14513285.

It is an arithmetic number, because the mean of its divisors is an integer number (43539843).

Almost surely, 2^145132805 is an apocalyptic number.

It is an amenable number.

145132805 is a deficient number, since it is larger than the sum of its proper divisors (29026567).

145132805 is an equidigital number, since it uses as much as digits as its factorization.

145132805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29026566.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 145132805 is about 12047.1077441849. The cubic root of 145132805 is about 525.5191297408.

The spelling of 145132805 in words is "one hundred forty-five million, one hundred thirty-two thousand, eight hundred five".