1405053421 has 2 divisors, whose sum is σ = 1405053422. Its totient is φ = 1405053420.

The previous prime is 1405053389. The next prime is 1405053437. The reversal of 1405053421 is 1243505041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1059502500 + 345550921 = 32550^2 + 18589^2 .

It is an emirp because it is prime and its reverse (1243505041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1405053421 - 2⁵ = 1405053389 is a prime.

It is a super-5 number, since 5×1405053421⁵ (a number of 47 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405053121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702526710 + 702526711.

It is an arithmetic number, because the mean of its divisors is an integer number (702526711).

Almost surely, 2^1405053421 is an apocalyptic number.

It is an amenable number.

1405053421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405053421 is an equidigital number, since it uses as much as digits as its factorization.

1405053421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1405053421 is about 37484.0422179892. The cubic root of 1405053421 is about 1120.0333272927.

Adding to 1405053421 its reverse (1243505041), we get a palindrome (2648558462).

The spelling of 1405053421 in words is "one billion, four hundred five million, fifty-three thousand, four hundred twenty-one".