145004321 has 16 divisors (see below), whose sum is σ = 187021440. Its totient is φ = 109092480.

The previous prime is 145004303. The next prime is 145004341. The reversal of 145004321 is 123400541.

It is not a de Polignac number, because 145004321 - 2²² = 140810017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145004293 and 145004302.

It is not an unprimeable number, because it can be changed into a prime (145004341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30236 + ... + 34701.

It is an arithmetic number, because the mean of its divisors is an integer number (11688840).

Almost surely, 2^145004321 is an apocalyptic number.

145004321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145004321 is a deficient number, since it is larger than the sum of its proper divisors (42017119).

145004321 is a wasteful number, since it uses less digits than its factorization.

145004321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64984.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 145004321 is about 12041.7739972149. The cubic root of 145004321 is about 525.3640057614.

Adding to 145004321 its reverse (123400541), we get a palindrome (268404862).

The spelling of 145004321 in words is "one hundred forty-five million, four thousand, three hundred twenty-one".