145509605 has 8 divisors (see below), whose sum is σ = 175658112. Its totient is φ = 115709968.

The previous prime is 145509527. The next prime is 145509607. The reversal of 145509605 is 506905541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145509605 - 2¹² = 145505509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145509607) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 86297 + ... + 87966.

It is an arithmetic number, because the mean of its divisors is an integer number (21957264).

Almost surely, 2^145509605 is an apocalyptic number.

It is an amenable number.

145509605 is a deficient number, since it is larger than the sum of its proper divisors (30148507).

145509605 is a wasteful number, since it uses less digits than its factorization.

145509605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174435.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 145509605 is about 12062.7362153037. The cubic root of 145509605 is about 525.9735284764.

The spelling of 145509605 in words is "one hundred forty-five million, five hundred nine thousand, six hundred five".