1452138521 has 4 divisors (see below), whose sum is σ = 1537558452. Its totient is φ = 1366718592.

The previous prime is 1452138491. The next prime is 1452138529. The reversal of 1452138521 is 1258312541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 456420496 + 995718025 = 21364^2 + 31555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1452138521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1452138529) 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, 42709940 + ... + 42709973.

It is an arithmetic number, because the mean of its divisors is an integer number (384389613).

Almost surely, 2^1452138521 is an apocalyptic number.

It is an amenable number.

1452138521 is a deficient number, since it is larger than the sum of its proper divisors (85419931).

1452138521 is an equidigital number, since it uses as much as digits as its factorization.

1452138521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85419930.

The product of its digits is 9600, while the sum is 32.

The square root of 1452138521 is about 38106.9353399089. The cubic root of 1452138521 is about 1132.4073565560.

The spelling of 1452138521 in words is "one billion, four hundred fifty-two million, one hundred thirty-eight thousand, five hundred twenty-one".