145552545 has 20 divisors (see below), whose sum is σ = 260917140. Its totient is φ = 77627808.

The previous prime is 145552529. The next prime is 145552553. The reversal of 145552545 is 545255541.

145552545 is a `hidden beast` number, since 14 + 55 + 52 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 126967824 = 4311^2 + 11268^2 .

It is not a de Polignac number, because 145552545 - 2⁴ = 145552529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 179290 + ... + 180099.

It is an arithmetic number, because the mean of its divisors is an integer number (13045857).

Almost surely, 2^145552545 is an apocalyptic number.

145552545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145552545 is a deficient number, since it is larger than the sum of its proper divisors (115364595).

145552545 is an equidigital number, since it uses as much as digits as its factorization.

145552545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359406 (or 359397 counting only the distinct ones).

The product of its digits is 100000, while the sum is 36.

The square root of 145552545 is about 12064.5159455322. The cubic root of 145552545 is about 526.0252617899.

The spelling of 145552545 in words is "one hundred forty-five million, five hundred fifty-two thousand, five hundred forty-five".