145123001 has 4 divisors (see below), whose sum is σ = 145375092. Its totient is φ = 144870912.

The previous prime is 145122941. The next prime is 145123019. The reversal of 145123001 is 100321541.

145123001 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.

It can be written as a sum of positive squares in 2 ways, for example, as 137827600 + 7295401 = 11740^2 + 2701^2 .

It is a cyclic number.

It is not a de Polignac number, because 145123001 - 2⁶ = 145122937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145123021) 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, 125180 + ... + 126333.

It is an arithmetic number, because the mean of its divisors is an integer number (36343773).

Almost surely, 2^145123001 is an apocalyptic number.

It is an amenable number.

145123001 is a deficient number, since it is larger than the sum of its proper divisors (252091).

145123001 is an equidigital number, since it uses as much as digits as its factorization.

145123001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252090.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 145123001 is about 12046.7008346684. The cubic root of 145123001 is about 525.5072961984.

Adding to 145123001 its reverse (100321541), we get a palindrome (245444542).

The spelling of 145123001 in words is "one hundred forty-five million, one hundred twenty-three thousand, one".