1405430421 has 4 divisors (see below), whose sum is σ = 1873907232. Its totient is φ = 936953612.

The previous prime is 1405430407. The next prime is 1405430441. The reversal of 1405430421 is 1240345041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1405430421 - 2⁶ = 1405430357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1405430391 and 1405430400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405430401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234238401 + ... + 234238406.

It is an arithmetic number, because the mean of its divisors is an integer number (468476808).

Almost surely, 2^1405430421 is an apocalyptic number.

It is an amenable number.

1405430421 is a deficient number, since it is larger than the sum of its proper divisors (468476811).

1405430421 is an equidigital number, since it uses as much as digits as its factorization.

1405430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468476810.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1405430421 is about 37489.0706873350. The cubic root of 1405430421 is about 1120.1334930700.

Adding to 1405430421 its reverse (1240345041), we get a palindrome (2645775462).

The spelling of 1405430421 in words is "one billion, four hundred five million, four hundred thirty thousand, four hundred twenty-one".