145422321 has 16 divisors (see below), whose sum is σ = 217242048. Its totient is φ = 85752000.

The previous prime is 145422283. The next prime is 145422323. The reversal of 145422321 is 123224541.

It is not a de Polignac number, because 145422321 - 2¹⁴ = 145405937 is a prime.

It is a super-2 number, since 2×145422321² = 42295302890054082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145422291 and 145422300.

It is not an unprimeable number, because it can be changed into a prime (145422323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58330 + ... + 60771.

It is an arithmetic number, because the mean of its divisors is an integer number (13577628).

Almost surely, 2^145422321 is an apocalyptic number.

145422321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145422321 is a deficient number, since it is larger than the sum of its proper divisors (71819727).

145422321 is a wasteful number, since it uses less digits than its factorization.

145422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119152.

The product of its digits is 1920, while the sum is 24.

The square root of 145422321 is about 12059.1177537994. The cubic root of 145422321 is about 525.8683389575.

Adding to 145422321 its reverse (123224541), we get a palindrome (268646862).

The spelling of 145422321 in words is "one hundred forty-five million, four hundred twenty-two thousand, three hundred twenty-one".