145340001 has 28 divisors (see below), whose sum is σ = 219251428. Its totient is φ = 96297984.

The previous prime is 145339993. The next prime is 145340009. The reversal of 145340001 is 100043541.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (145339993) and next prime (145340009).

It can be written as a sum of positive squares in 2 ways, for example, as 96059601 + 49280400 = 9801^2 + 7020^2 .

It is not a de Polignac number, because 145340001 - 2³ = 145339993 is a prime.

It is a super-2 number, since 2×145340001² = 42247431781360002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145340009) 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 27 ways as a sum of consecutive naturals, for example, 140181 + ... + 141213.

Almost surely, 2^145340001 is an apocalyptic number.

It is an amenable number.

145340001 is a deficient number, since it is larger than the sum of its proper divisors (73911427).

145340001 is an equidigital number, since it uses as much as digits as its factorization.

145340001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 145340001 is about 12055.7040856186. The cubic root of 145340001 is about 525.7690931831.

Adding to 145340001 its reverse (100043541), we get a palindrome (245383542).

The spelling of 145340001 in words is "one hundred forty-five million, three hundred forty thousand, one".