1353240445 has 4 divisors (see below), whose sum is σ = 1623888540. Its totient is φ = 1082592352.

The previous prime is 1353240437. The next prime is 1353240491. The reversal of 1353240445 is 5440423531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5440423531 = 61 ⋅89187271.

It can be written as a sum of positive squares in 2 ways, for example, as 317623684 + 1035616761 = 17822^2 + 32181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353240445 - 2³ = 1353240437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135324040 + ... + 135324049.

It is an arithmetic number, because the mean of its divisors is an integer number (405972135).

Almost surely, 2^1353240445 is an apocalyptic number.

It is an amenable number.

1353240445 is a deficient number, since it is larger than the sum of its proper divisors (270648095).

1353240445 is an equidigital number, since it uses as much as digits as its factorization.

1353240445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270648094.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 1353240445 is about 36786.4165827551. The cubic root of 1353240445 is about 1106.0930320020.

Adding to 1353240445 its reverse (5440423531), we get a palindrome (6793663976).

The spelling of 1353240445 in words is "one billion, three hundred fifty-three million, two hundred forty thousand, four hundred forty-five".