145053409 has 8 divisors (see below), whose sum is σ = 147699560. Its totient is φ = 142425216.

The previous prime is 145053379. The next prime is 145053413. The reversal of 145053409 is 904350541.

It can be written as a sum of positive squares in 4 ways, for example, as 41319184 + 103734225 = 6428^2 + 10185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145053409 - 2⁷ = 145053281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145053109) 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 7 ways as a sum of consecutive naturals, for example, 12379 + ... + 21055.

It is an arithmetic number, because the mean of its divisors is an integer number (18462445).

Almost surely, 2^145053409 is an apocalyptic number.

It is an amenable number.

145053409 is a deficient number, since it is larger than the sum of its proper divisors (2646151).

145053409 is an equidigital number, since it uses as much as digits as its factorization.

145053409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 145053409 is about 12043.8120626320. The cubic root of 145053409 is about 525.4232825208.

The spelling of 145053409 in words is "one hundred forty-five million, fifty-three thousand, four hundred nine".