1443145421 has 2 divisors, whose sum is σ = 1443145422. Its totient is φ = 1443145420.

The previous prime is 1443145409. The next prime is 1443145433. The reversal of 1443145421 is 1245413441.

It is a balanced prime because it is at equal distance from previous prime (1443145409) and next prime (1443145433).

It can be written as a sum of positive squares in only one way, i.e., 1379305321 + 63840100 = 37139^2 + 7990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1443145421 - 2¹⁰ = 1443144397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1443145441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721572710 + 721572711.

It is an arithmetic number, because the mean of its divisors is an integer number (721572711).

Almost surely, 2^1443145421 is an apocalyptic number.

It is an amenable number.

1443145421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1443145421 is an equidigital number, since it uses as much as digits as its factorization.

1443145421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 1443145421 is about 37988.7538753247. The cubic root of 1443145421 is about 1130.0648463061.

Adding to 1443145421 its reverse (1245413441), we get a palindrome (2688558862).

The spelling of 1443145421 in words is "one billion, four hundred forty-three million, one hundred forty-five thousand, four hundred twenty-one".