149728565 has 12 divisors (see below), whose sum is σ = 209009196. Its totient is φ = 102670848.

The previous prime is 149728547. The next prime is 149728573. The reversal of 149728565 is 565827941.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84474481 + 65254084 = 9191^2 + 8078^2 .

It is not a de Polignac number, because 149728565 - 2¹⁰ = 149727541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305324 + ... + 305813.

It is an arithmetic number, because the mean of its divisors is an integer number (17417433).

Almost surely, 2^149728565 is an apocalyptic number.

It is an amenable number.

149728565 is a deficient number, since it is larger than the sum of its proper divisors (59280631).

149728565 is an equidigital number, since it uses as much as digits as its factorization.

149728565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611156 (or 611149 counting only the distinct ones).

The product of its digits is 604800, while the sum is 47.

The square root of 149728565 is about 12236.3624088207. The cubic root of 149728565 is about 531.0085991588.

The spelling of 149728565 in words is "one hundred forty-nine million, seven hundred twenty-eight thousand, five hundred sixty-five".