1006143421 has 2 divisors, whose sum is σ = 1006143422. Its totient is φ = 1006143420.

The previous prime is 1006143389. The next prime is 1006143431. The reversal of 1006143421 is 1243416001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875864025 + 130279396 = 29595^2 + 11414^2 .

It is an emirp because it is prime and its reverse (1243416001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1006143421 - 2⁵ = 1006143389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1006143392 and 1006143401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1006143431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503071710 + 503071711.

It is an arithmetic number, because the mean of its divisors is an integer number (503071711).

Almost surely, 2^1006143421 is an apocalyptic number.

It is an amenable number.

1006143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006143421 is an equidigital number, since it uses as much as digits as its factorization.

1006143421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1006143421 is about 31719.7638862587. The cubic root of 1006143421 is about 1002.0436277406.

Adding to 1006143421 its reverse (1243416001), we get a palindrome (2249559422).

The spelling of 1006143421 in words is "one billion, six million, one hundred forty-three thousand, four hundred twenty-one".