145240453 has 4 divisors (see below), whose sum is σ = 145314688. Its totient is φ = 145166220.

The previous prime is 145240441. The next prime is 145240457. The reversal of 145240453 is 354042541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 354042541 = 2579 ⋅137279.

It is a cyclic number.

It is not a de Polignac number, because 145240453 - 2²⁵ = 111686021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145240457) 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, 34101 + ... + 38122.

It is an arithmetic number, because the mean of its divisors is an integer number (36328672).

Almost surely, 2^145240453 is an apocalyptic number.

It is an amenable number.

145240453 is a deficient number, since it is larger than the sum of its proper divisors (74235).

145240453 is an equidigital number, since it uses as much as digits as its factorization.

145240453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74234.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 145240453 is about 12051.5747103854. The cubic root of 145240453 is about 525.6490270956.

Adding to 145240453 its reverse (354042541), we get a palindrome (499282994).

It can be divided in two parts, 1452 and 40453, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 145240453 in words is "one hundred forty-five million, two hundred forty thousand, four hundred fifty-three".