1445562421 has 2 divisors, whose sum is σ = 1445562422. Its totient is φ = 1445562420.

The previous prime is 1445562413. The next prime is 1445562431. The reversal of 1445562421 is 1242655441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1259540100 + 186022321 = 35490^2 + 13639^2 .

It is an emirp because it is prime and its reverse (1242655441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1445562421 - 2³ = 1445562413 is a prime.

It is a super-3 number, since 3×1445562421³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445562401) 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, 722781210 + 722781211.

It is an arithmetic number, because the mean of its divisors is an integer number (722781211).

Almost surely, 2^1445562421 is an apocalyptic number.

It is an amenable number.

1445562421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445562421 is an equidigital number, since it uses as much as digits as its factorization.

1445562421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 34.

The square root of 1445562421 is about 38020.5526130276. The cubic root of 1445562421 is about 1130.6953771977.

The spelling of 1445562421 in words is "one billion, four hundred forty-five million, five hundred sixty-two thousand, four hundred twenty-one".