145243451 has 4 divisors (see below), whose sum is σ = 145272600. Its totient is φ = 145214304.

The previous prime is 145243447. The next prime is 145243477. The reversal of 145243451 is 154342541.

145243451 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: 154342541 = 17 ⋅9078973.

It is a cyclic number.

It is not a de Polignac number, because 145243451 - 2² = 145243447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145243411) 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, 5006 + ... + 17763.

It is an arithmetic number, because the mean of its divisors is an integer number (36318150).

Almost surely, 2^145243451 is an apocalyptic number.

145243451 is a deficient number, since it is larger than the sum of its proper divisors (29149).

145243451 is an equidigital number, since it uses as much as digits as its factorization.

145243451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29148.

The product of its digits is 9600, while the sum is 29.

The square root of 145243451 is about 12051.6990918293. The cubic root of 145243451 is about 525.6526438220.

Adding to 145243451 its reverse (154342541), we get a palindrome (299585992).

The spelling of 145243451 in words is "one hundred forty-five million, two hundred forty-three thousand, four hundred fifty-one".