145020523 has 4 divisors (see below), whose sum is σ = 153551160. Its totient is φ = 136489888.

The previous prime is 145020517. The next prime is 145020541. The reversal of 145020523 is 325020541.

145020523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325020541 = 3877 ⋅83833.

It is a cyclic number.

It is not a de Polignac number, because 145020523 - 2⁹ = 145020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145020494 and 145020503.

It is not an unprimeable number, because it can be changed into a prime (145020583) 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, 4265293 + ... + 4265326.

It is an arithmetic number, because the mean of its divisors is an integer number (38387790).

Almost surely, 2^145020523 is an apocalyptic number.

145020523 is a deficient number, since it is larger than the sum of its proper divisors (8530637).

145020523 is an equidigital number, since it uses as much as digits as its factorization.

145020523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530636.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 145020523 is about 12042.4467198323. The cubic root of 145020523 is about 525.3835721453.

The spelling of 145020523 in words is "one hundred forty-five million, twenty thousand, five hundred twenty-three".