145543321 has 8 divisors (see below), whose sum is σ = 181456704. Its totient is φ = 113410320.

The previous prime is 145543319. The next prime is 145543327. The reversal of 145543321 is 123345541.

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 145543321 - 2¹ = 145543319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145543321.

It is not an unprimeable number, because it can be changed into a prime (145543327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945010 + ... + 945163.

It is an arithmetic number, because the mean of its divisors is an integer number (22682088).

Almost surely, 2^145543321 is an apocalyptic number.

145543321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145543321 is a deficient number, since it is larger than the sum of its proper divisors (35913383).

145543321 is a wasteful number, since it uses less digits than its factorization.

145543321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890191.

The product of its digits is 7200, while the sum is 28.

The square root of 145543321 is about 12064.1336613948. The cubic root of 145543321 is about 526.0141497444.

Adding to 145543321 its reverse (123345541), we get a palindrome (268888862).

The spelling of 145543321 in words is "one hundred forty-five million, five hundred forty-three thousand, three hundred twenty-one".