1405285613 has 4 divisors (see below), whose sum is σ = 1405362108. Its totient is φ = 1405209120.

The previous prime is 1405285591. The next prime is 1405285621. The reversal of 1405285613 is 3165825041.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1233203689 + 172081924 = 35117^2 + 13118^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405285613 - 2¹⁰ = 1405284589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405285643) 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, 7745 + ... + 53577.

It is an arithmetic number, because the mean of its divisors is an integer number (351340527).

Almost surely, 2^1405285613 is an apocalyptic number.

It is an amenable number.

1405285613 is a deficient number, since it is larger than the sum of its proper divisors (76495).

1405285613 is an equidigital number, since it uses as much as digits as its factorization.

1405285613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76494.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1405285613 is about 37487.1393013657. The cubic root of 1405285613 is about 1120.0950209029.

The spelling of 1405285613 in words is "one billion, four hundred five million, two hundred eighty-five thousand, six hundred thirteen".