1405575641 has 4 divisors (see below), whose sum is σ = 1410066612. Its totient is φ = 1401084672.

The previous prime is 1405575629. The next prime is 1405575643. The reversal of 1405575641 is 1465755041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1465755041 = 4523 ⋅324067.

It can be written as a sum of positive squares in 2 ways, for example, as 523723225 + 881852416 = 22885^2 + 29696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405575641 - 2¹⁰ = 1405574617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1405575595 and 1405575604.

It is not an unprimeable number, because it can be changed into a prime (1405575643) 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 3 ways as a sum of consecutive naturals, for example, 2245016 + ... + 2245641.

It is an arithmetic number, because the mean of its divisors is an integer number (352516653).

Almost surely, 2^1405575641 is an apocalyptic number.

It is an amenable number.

1405575641 is a deficient number, since it is larger than the sum of its proper divisors (4490971).

1405575641 is an equidigital number, since it uses as much as digits as its factorization.

1405575641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490970.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 1405575641 is about 37491.0074684584. The cubic root of 1405575641 is about 1120.1720720422.

The spelling of 1405575641 in words is "one billion, four hundred five million, five hundred seventy-five thousand, six hundred forty-one".