145665255 has 32 divisors (see below), whose sum is σ = 238074048. Its totient is φ = 76032000.

The previous prime is 145665227. The next prime is 145665257. The reversal of 145665255 is 552566541.

It is a happy number.

It is not a de Polignac number, because 145665255 - 2⁷ = 145665127 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145665257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363055 + ... + 363455.

It is an arithmetic number, because the mean of its divisors is an integer number (7439814).

Almost surely, 2^145665255 is an apocalyptic number.

145665255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145665255 is a deficient number, since it is larger than the sum of its proper divisors (92408793).

145665255 is a wasteful number, since it uses less digits than its factorization.

145665255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867.

The product of its digits is 180000, while the sum is 39.

The square root of 145665255 is about 12069.1861780321. The cubic root of 145665255 is about 526.1610043159.

The spelling of 145665255 in words is "one hundred forty-five million, six hundred sixty-five thousand, two hundred fifty-five".