145531247123 has 2 divisors, whose sum is σ = 145531247124. Its totient is φ = 145531247122.

The previous prime is 145531247063. The next prime is 145531247171. The reversal of 145531247123 is 321742135541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145531247123 - 2²² = 145527052819 is a prime.

It is not a weakly prime, because it can be changed into another prime (145531217123) 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 as a sum of consecutive naturals, namely, 72765623561 + 72765623562.

It is an arithmetic number, because the mean of its divisors is an integer number (72765623562).

Almost surely, 2^145531247123 is an apocalyptic number.

145531247123 is a deficient number, since it is larger than the sum of its proper divisors (1).

145531247123 is an equidigital number, since it uses as much as digits as its factorization.

145531247123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The spelling of 145531247123 in words is "one hundred forty-five billion, five hundred thirty-one million, two hundred forty-seven thousand, one hundred twenty-three".