145506305 has 16 divisors (see below), whose sum is σ = 201613440. Its totient is φ = 98744832.

The previous prime is 145506299. The next prime is 145506323. The reversal of 145506305 is 503605541.

It is a cyclic number.

It is not a de Polignac number, because 145506305 - 2⁶ = 145506241 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18035 + ... + 24824.

It is an arithmetic number, because the mean of its divisors is an integer number (12600840).

It is a Proth number, since it is equal to 8881 ⋅ 2¹⁴ + 1 and 8881 < 2¹⁴.

Almost surely, 2^145506305 is an apocalyptic number.

It is an amenable number.

145506305 is a deficient number, since it is larger than the sum of its proper divisors (56107135).

145506305 is an equidigital number, since it uses as much as digits as its factorization.

145506305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42968.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 145506305 is about 12062.5994296420. The cubic root of 145506305 is about 525.9695522767.

The spelling of 145506305 in words is "one hundred forty-five million, five hundred six thousand, three hundred five".