145243841 has 2 divisors, whose sum is σ = 145243842. Its totient is φ = 145243840.

The previous prime is 145243837. The next prime is 145243843. The reversal of 145243841 is 148342541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100300225 + 44943616 = 10015^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 145243841 - 2² = 145243837 is a prime.

Together with 145243843, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 145243798 and 145243807.

It is not a weakly prime, because it can be changed into another prime (145243843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72621920 + 72621921.

It is an arithmetic number, because the mean of its divisors is an integer number (72621921).

Almost surely, 2^145243841 is an apocalyptic number.

It is an amenable number.

145243841 is a deficient number, since it is larger than the sum of its proper divisors (1).

145243841 is an equidigital number, since it uses as much as digits as its factorization.

145243841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 32.

The square root of 145243841 is about 12051.7152721096. The cubic root of 145243841 is about 525.6531143064.

The spelling of 145243841 in words is "one hundred forty-five million, two hundred forty-three thousand, eight hundred forty-one".