145230404021 has 2 divisors, whose sum is σ = 145230404022. Its totient is φ = 145230404020.

The previous prime is 145230403957. The next prime is 145230404023. The reversal of 145230404021 is 120404032541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140553759025 + 4676644996 = 374905^2 + 68386^2 .

It is a cyclic number.

It is not a de Polignac number, because 145230404021 - 2⁶ = 145230403957 is a prime.

Together with 145230404023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145230404023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72615202010 + 72615202011.

It is an arithmetic number, because the mean of its divisors is an integer number (72615202011).

Almost surely, 2^145230404021 is an apocalyptic number.

It is an amenable number.

145230404021 is a deficient number, since it is larger than the sum of its proper divisors (1).

145230404021 is an equidigital number, since it uses as much as digits as its factorization.

145230404021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 145230404021 its reverse (120404032541), we get a palindrome (265634436562).

The spelling of 145230404021 in words is "one hundred forty-five billion, two hundred thirty million, four hundred four thousand, twenty-one".