145231243 has 4 divisors (see below), whose sum is σ = 145991808. Its totient is φ = 144470680.

The previous prime is 145231241. The next prime is 145231259. The reversal of 145231243 is 342132541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145231243 - 2¹ = 145231241 is a prime.

It is a super-2 number, since 2×145231243² = 42184227886650098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145231241) 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 3 ways as a sum of consecutive naturals, for example, 379996 + ... + 380377.

It is an arithmetic number, because the mean of its divisors is an integer number (36497952).

Almost surely, 2^145231243 is an apocalyptic number.

145231243 is a deficient number, since it is larger than the sum of its proper divisors (760565).

145231243 is an equidigital number, since it uses as much as digits as its factorization.

145231243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760564.

The product of its digits is 2880, while the sum is 25.

The square root of 145231243 is about 12051.1925965856. The cubic root of 145231243 is about 525.6379160270.

Adding to 145231243 its reverse (342132541), we get a palindrome (487363784).

The spelling of 145231243 in words is "one hundred forty-five million, two hundred thirty-one thousand, two hundred forty-three".