1452971521 has 8 divisors (see below), whose sum is σ = 1567468584. Its totient is φ = 1341699840.

The previous prime is 1452971501. The next prime is 1452971551. The reversal of 1452971521 is 1251792541.

It can be written as a sum of positive squares in 4 ways, for example, as 932447296 + 520524225 = 30536^2 + 22815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1452971521 - 2⁷ = 1452971393 is a prime.

It is a super-2 number, since 2×1452971521² = 4222252481674106882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1452971501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805410 + ... + 807211.

It is an arithmetic number, because the mean of its divisors is an integer number (195933573).

Almost surely, 2^1452971521 is an apocalyptic number.

It is an amenable number.

1452971521 is a deficient number, since it is larger than the sum of its proper divisors (114497063).

1452971521 is a wasteful number, since it uses less digits than its factorization.

1452971521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612691.

The product of its digits is 25200, while the sum is 37.

The square root of 1452971521 is about 38117.8635419143. The cubic root of 1452971521 is about 1132.6238453189.

The spelling of 1452971521 in words is "one billion, four hundred fifty-two million, nine hundred seventy-one thousand, five hundred twenty-one".