1452212021 has 8 divisors (see below), whose sum is σ = 1581494040. Its totient is φ = 1325440512.

The previous prime is 1452211991. The next prime is 1452212053. The reversal of 1452212021 is 1202122541.

It can be written as a sum of positive squares in 4 ways, for example, as 134884996 + 1317327025 = 11614^2 + 36295^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1452212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1452211984 and 1452212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1452212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626420 + ... + 628733.

It is an arithmetic number, because the mean of its divisors is an integer number (197686755).

Almost surely, 2^1452212021 is an apocalyptic number.

It is an amenable number.

1452212021 is a deficient number, since it is larger than the sum of its proper divisors (129282019).

1452212021 is a wasteful number, since it uses less digits than its factorization.

1452212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255255.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1452212021 is about 38107.8997190871. The cubic root of 1452212021 is about 1132.4264618354.

Adding to 1452212021 its reverse (1202122541), we get a palindrome (2654334562).

The spelling of 1452212021 in words is "one billion, four hundred fifty-two million, two hundred twelve thousand, twenty-one".