1445290321 has 2 divisors, whose sum is σ = 1445290322. Its totient is φ = 1445290320.

The previous prime is 1445290289. The next prime is 1445290331. The reversal of 1445290321 is 1230925441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1122585025 + 322705296 = 33505^2 + 17964^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445290321 - 2⁵ = 1445290289 is a prime.

It is a super-2 number, since 2×1445290321² = 4177728223952566082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1445290331) 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 as a sum of consecutive naturals, namely, 722645160 + 722645161.

It is an arithmetic number, because the mean of its divisors is an integer number (722645161).

Almost surely, 2^1445290321 is an apocalyptic number.

It is an amenable number.

1445290321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445290321 is an equidigital number, since it uses as much as digits as its factorization.

1445290321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1445290321 is about 38016.9741168337. The cubic root of 1445290321 is about 1130.6244286834.

The spelling of 1445290321 in words is "one billion, four hundred forty-five million, two hundred ninety thousand, three hundred twenty-one".