1424400421 has 2 divisors, whose sum is σ = 1424400422. Its totient is φ = 1424400420.

The previous prime is 1424400401. The next prime is 1424400449. The reversal of 1424400421 is 1240044241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1024960225 + 399440196 = 32015^2 + 19986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1424400421 - 2⁵ = 1424400389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1424400392 and 1424400401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1424400401) 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, 712200210 + 712200211.

It is an arithmetic number, because the mean of its divisors is an integer number (712200211).

Almost surely, 2^1424400421 is an apocalyptic number.

It is an amenable number.

1424400421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1424400421 is an equidigital number, since it uses as much as digits as its factorization.

1424400421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1424400421 is about 37741.2297229436. The cubic root of 1424400421 is about 1125.1507079745.

Adding to 1424400421 its reverse (1240044241), we get a palindrome (2664444662).

The spelling of 1424400421 in words is "one billion, four hundred twenty-four million, four hundred thousand, four hundred twenty-one".