145226665 has 32 divisors (see below), whose sum is σ = 192871584. Its totient is φ = 104509440.

The previous prime is 145226651. The next prime is 145226681. The reversal of 145226665 is 566622541.

It can be written as a sum of positive squares in 16 ways, for example, as 15335056 + 129891609 = 3916^2 + 11397^2 .

It is not a de Polignac number, because 145226665 - 2⁹ = 145226153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191467 + ... + 192223.

It is an arithmetic number, because the mean of its divisors is an integer number (6027237).

Almost surely, 2^145226665 is an apocalyptic number.

It is an amenable number.

145226665 is a deficient number, since it is larger than the sum of its proper divisors (47644919).

145226665 is a wasteful number, since it uses less digits than its factorization.

145226665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877.

The product of its digits is 86400, while the sum is 37.

The square root of 145226665 is about 12051.0026553810. The cubic root of 145226665 is about 525.6323928912.

The spelling of 145226665 in words is "one hundred forty-five million, two hundred twenty-six thousand, six hundred sixty-five".