1423040221 has 2 divisors, whose sum is σ = 1423040222. Its totient is φ = 1423040220.

The previous prime is 1423040219. The next prime is 1423040243. The reversal of 1423040221 is 1220403241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1420234596 + 2805625 = 37686^2 + 1675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423040221 - 2¹ = 1423040219 is a prime.

Together with 1423040219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423040251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711520110 + 711520111.

It is an arithmetic number, because the mean of its divisors is an integer number (711520111).

Almost surely, 2^1423040221 is an apocalyptic number.

It is an amenable number.

1423040221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423040221 is an equidigital number, since it uses as much as digits as its factorization.

1423040221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1423040221 is about 37723.2053383590. The cubic root of 1423040221 is about 1124.7924479002.

Adding to 1423040221 its reverse (1220403241), we get a palindrome (2643443462).

The spelling of 1423040221 in words is "one billion, four hundred twenty-three million, forty thousand, two hundred twenty-one".