1452668221 has 2 divisors, whose sum is σ = 1452668222. Its totient is φ = 1452668220.

The previous prime is 1452668219. The next prime is 1452668233. The reversal of 1452668221 is 1228662541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 790172100 + 662496121 = 28110^2 + 25739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1452668221 - 2¹ = 1452668219 is a prime.

It is a super-2 number, since 2×1452668221² = 4220489920606609682, which contains 22 as substring.

Together with 1452668219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1452668281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 726334110 + 726334111.

It is an arithmetic number, because the mean of its divisors is an integer number (726334111).

Almost surely, 2^1452668221 is an apocalyptic number.

It is an amenable number.

1452668221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1452668221 is an equidigital number, since it uses as much as digits as its factorization.

1452668221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 1452668221 is about 38113.8848846454. The cubic root of 1452668221 is about 1132.5450301201.

The spelling of 1452668221 in words is "one billion, four hundred fifty-two million, six hundred sixty-eight thousand, two hundred twenty-one".