145246321 has 4 divisors (see below), whose sum is σ = 158450544. Its totient is φ = 132042100.

The previous prime is 145246291. The next prime is 145246331. The reversal of 145246321 is 123642541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145246321 - 2⁷ = 145246193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145246321.

It is not an unprimeable number, because it can be changed into a prime (145246331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6602095 + ... + 6602116.

It is an arithmetic number, because the mean of its divisors is an integer number (39612636).

Almost surely, 2^145246321 is an apocalyptic number.

145246321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145246321 is a deficient number, since it is larger than the sum of its proper divisors (13204223).

145246321 is a wasteful number, since it uses less digits than its factorization.

145246321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13204222.

The product of its digits is 5760, while the sum is 28.

The square root of 145246321 is about 12051.8181615887. The cubic root of 145246321 is about 525.6561060851.

Adding to 145246321 its reverse (123642541), we get a palindrome (268888862).

The spelling of 145246321 in words is "one hundred forty-five million, two hundred forty-six thousand, three hundred twenty-one".