1405311421 has 16 divisors (see below), whose sum is σ = 1516584960. Its totient is φ = 1297989360.

The previous prime is 1405311407. The next prime is 1405311451. The reversal of 1405311421 is 1241135041.

It is a cyclic number.

It is not a de Polignac number, because 1405311421 - 2⁵ = 1405311389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1405311392 and 1405311401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405311451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239100 + ... + 244906.

It is an arithmetic number, because the mean of its divisors is an integer number (94786560).

Almost surely, 2^1405311421 is an apocalyptic number.

It is an amenable number.

1405311421 is a deficient number, since it is larger than the sum of its proper divisors (111273539).

1405311421 is a wasteful number, since it uses less digits than its factorization.

1405311421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6144.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1405311421 is about 37487.4835245045. The cubic root of 1405311421 is about 1120.1018776906.

Adding to 1405311421 its reverse (1241135041), we get a palindrome (2646446462).

The spelling of 1405311421 in words is "one billion, four hundred five million, three hundred eleven thousand, four hundred twenty-one".