1406351421 has 12 divisors (see below), whose sum is σ = 2078638848. Its totient is φ = 915763464.

The previous prime is 1406351411. The next prime is 1406351423. The reversal of 1406351421 is 1241536041.

It is a happy number.

1406351421 is a `hidden beast` number, since 1 + 4 + 0 + 635 + 1 + 4 + 21 = 666.

It is not a de Polignac number, because 1406351421 - 2⁹ = 1406350909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406351423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1816605 + ... + 1817378.

It is an arithmetic number, because the mean of its divisors is an integer number (173219904).

Almost surely, 2^1406351421 is an apocalyptic number.

It is an amenable number.

1406351421 is a deficient number, since it is larger than the sum of its proper divisors (672287427).

1406351421 is a wasteful number, since it uses less digits than its factorization.

1406351421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634032 (or 3634029 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1406351421 is about 37501.3522556187. The cubic root of 1406351421 is about 1120.3781198319.

Adding to 1406351421 its reverse (1241536041), we get a palindrome (2647887462).

The spelling of 1406351421 in words is "one billion, four hundred six million, three hundred fifty-one thousand, four hundred twenty-one".