145326909 has 16 divisors (see below), whose sum is σ = 238485632. Its totient is φ = 76655808.

The previous prime is 145326889. The next prime is 145326913. The reversal of 145326909 is 909623541.

It is not a de Polignac number, because 145326909 - 2⁷ = 145326781 is a prime.

It is a super-2 number, since 2×145326909² = 42239820958988562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145326809) 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 15 ways as a sum of consecutive naturals, for example, 265894 + ... + 266439.

It is an arithmetic number, because the mean of its divisors is an integer number (14905352).

Almost surely, 2^145326909 is an apocalyptic number.

It is an amenable number.

145326909 is a deficient number, since it is larger than the sum of its proper divisors (93158723).

145326909 is a wasteful number, since it uses less digits than its factorization.

145326909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532356.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 145326909 is about 12055.1610939050. The cubic root of 145326909 is about 525.7533058898.

The spelling of 145326909 in words is "one hundred forty-five million, three hundred twenty-six thousand, nine hundred nine".