1450811821 has 2 divisors, whose sum is σ = 1450811822. Its totient is φ = 1450811820.

The previous prime is 1450811767. The next prime is 1450811827. The reversal of 1450811821 is 1281180541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311453796 + 139358025 = 36214^2 + 11805^2 .

It is an emirp because it is prime and its reverse (1281180541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1450811821 - 2⁷ = 1450811693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1450811827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725405910 + 725405911.

It is an arithmetic number, because the mean of its divisors is an integer number (725405911).

Almost surely, 2^1450811821 is an apocalyptic number.

It is an amenable number.

1450811821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1450811821 is an equidigital number, since it uses as much as digits as its factorization.

1450811821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 1450811821 is about 38089.5237696666. The cubic root of 1450811821 is about 1132.0623888688.

The spelling of 1450811821 in words is "one billion, four hundred fifty million, eight hundred eleven thousand, eight hundred twenty-one".