145141321 has 4 divisors (see below), whose sum is σ = 156306052. Its totient is φ = 133976592.

The previous prime is 145141313. The next prime is 145141333. The reversal of 145141321 is 123141541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123141541 = 1097 ⋅112253.

It can be written as a sum of positive squares in 2 ways, for example, as 37210000 + 107931321 = 6100^2 + 10389^2 .

It is a cyclic number.

It is not a de Polignac number, because 145141321 - 2³ = 145141313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145141292 and 145141301.

It is not an unprimeable number, because it can be changed into a prime (145141621) 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 3 ways as a sum of consecutive naturals, for example, 5582346 + ... + 5582371.

It is an arithmetic number, because the mean of its divisors is an integer number (39076513).

Almost surely, 2^145141321 is an apocalyptic number.

It is an amenable number.

145141321 is a deficient number, since it is larger than the sum of its proper divisors (11164731).

145141321 is a wasteful number, since it uses less digits than its factorization.

145141321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11164730.

The product of its digits is 480, while the sum is 22.

The square root of 145141321 is about 12047.4611848306. The cubic root of 145141321 is about 525.5294082196.

Adding to 145141321 its reverse (123141541), we get a palindrome (268282862).

The spelling of 145141321 in words is "one hundred forty-five million, one hundred forty-one thousand, three hundred twenty-one".