1452134221 has 4 divisors (see below), whose sum is σ = 1460157244. Its totient is φ = 1444111200.

The previous prime is 1452134213. The next prime is 1452134239. The reversal of 1452134221 is 1224312541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224312541 = 47 ⋅26049203.

It can be written as a sum of positive squares in 2 ways, for example, as 730620900 + 721513321 = 27030^2 + 26861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1452134221 - 2³ = 1452134213 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 (1452132221) 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, 4011240 + ... + 4011601.

It is an arithmetic number, because the mean of its divisors is an integer number (365039311).

Almost surely, 2^1452134221 is an apocalyptic number.

It is an amenable number.

1452134221 is a deficient number, since it is larger than the sum of its proper divisors (8023023).

1452134221 is an equidigital number, since it uses as much as digits as its factorization.

1452134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023022.

The product of its digits is 1920, while the sum is 25.

The square root of 1452134221 is about 38106.8789196911. The cubic root of 1452134221 is about 1132.4062388122.

Adding to 1452134221 its reverse (1224312541), we get a palindrome (2676446762).

The spelling of 1452134221 in words is "one billion, four hundred fifty-two million, one hundred thirty-four thousand, two hundred twenty-one".