145023451 has 4 divisors (see below), whose sum is σ = 145312272. Its totient is φ = 144734632.

The previous prime is 145023421. The next prime is 145023491. The reversal of 145023451 is 154320541.

It is a happy number.

145023451 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 is a cyclic number.

It is not a de Polignac number, because 145023451 - 2¹¹ = 145021403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145023421) 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, 143656 + ... + 144661.

It is an arithmetic number, because the mean of its divisors is an integer number (36328068).

Almost surely, 2^145023451 is an apocalyptic number.

145023451 is a deficient number, since it is larger than the sum of its proper divisors (288821).

145023451 is an equidigital number, since it uses as much as digits as its factorization.

145023451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288820.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145023451 is about 12042.5682891981. The cubic root of 145023451 is about 525.3871079959.

Adding to 145023451 its reverse (154320541), we get a palindrome (299343992).

The spelling of 145023451 in words is "one hundred forty-five million, twenty-three thousand, four hundred fifty-one".