1445399161 has 2 divisors, whose sum is σ = 1445399162. Its totient is φ = 1445399160.

The previous prime is 1445399147. The next prime is 1445399167. The reversal of 1445399161 is 1619935441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1335463936 + 109935225 = 36544^2 + 10485^2 .

It is an emirp because it is prime and its reverse (1619935441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1445399161 - 2¹⁵ = 1445366393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445399167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722699580 + 722699581.

It is an arithmetic number, because the mean of its divisors is an integer number (722699581).

Almost surely, 2^1445399161 is an apocalyptic number.

It is an amenable number.

1445399161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445399161 is an equidigital number, since it uses as much as digits as its factorization.

1445399161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 1445399161 is about 38018.4055557305. The cubic root of 1445399161 is about 1130.6528091576.

The spelling of 1445399161 in words is "one billion, four hundred forty-five million, three hundred ninety-nine thousand, one hundred sixty-one".