145206605 has 18 divisors (see below), whose sum is σ = 185686494. Its totient is φ = 108987136.

The previous prime is 145206577. The next prime is 145206617. The reversal of 145206605 is 506602541.

It can be written as a sum of positive squares in 9 ways, for example, as 62378404 + 82828201 = 7898^2 + 9101^2 .

It is not a de Polignac number, because 145206605 - 2⁶ = 145206541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 457907 + ... + 458223.

Almost surely, 2^145206605 is an apocalyptic number.

It is an amenable number.

145206605 is a deficient number, since it is larger than the sum of its proper divisors (40479889).

145206605 is an frugal number, since it uses more digits than its factorization.

145206605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 145206605 is about 12050.1703307464. The cubic root of 145206605 is about 525.6081901014.

The spelling of 145206605 in words is "one hundred forty-five million, two hundred six thousand, six hundred five".