1455521345 has 4 divisors (see below), whose sum is σ = 1746625620. Its totient is φ = 1164417072.

The previous prime is 1455521341. The next prime is 1455521369. The reversal of 1455521345 is 5431255541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5431255541 = 34123 ⋅159167.

It can be written as a sum of positive squares in 2 ways, for example, as 647142721 + 808378624 = 25439^2 + 28432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455521345 - 2² = 1455521341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1455521341) 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, 145552130 + ... + 145552139.

It is an arithmetic number, because the mean of its divisors is an integer number (436656405).

Almost surely, 2^1455521345 is an apocalyptic number.

It is an amenable number.

1455521345 is a deficient number, since it is larger than the sum of its proper divisors (291104275).

1455521345 is an equidigital number, since it uses as much as digits as its factorization.

1455521345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291104274.

The product of its digits is 60000, while the sum is 35.

The square root of 1455521345 is about 38151.2954563800. The cubic root of 1455521345 is about 1133.2860064339.

Adding to 1455521345 its reverse (5431255541), we get a palindrome (6886776886).

The spelling of 1455521345 in words is "one billion, four hundred fifty-five million, five hundred twenty-one thousand, three hundred forty-five".