1013540405 has 4 divisors (see below), whose sum is σ = 1216248492. Its totient is φ = 810832320.

The previous prime is 1013540393. The next prime is 1013540431. The reversal of 1013540405 is 5040453101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 243422404 + 770118001 = 15602^2 + 27751^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1013540405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101354036 + ... + 101354045.

It is an arithmetic number, because the mean of its divisors is an integer number (304062123).

Almost surely, 2^1013540405 is an apocalyptic number.

It is an amenable number.

1013540405 is a deficient number, since it is larger than the sum of its proper divisors (202708087).

1013540405 is an equidigital number, since it uses as much as digits as its factorization.

1013540405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202708086.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1013540405 is about 31836.1493431602. The cubic root of 1013540405 is about 1004.4932488100.

Adding to 1013540405 its reverse (5040453101), we get a palindrome (6053993506).

The spelling of 1013540405 in words is "one billion, thirteen million, five hundred forty thousand, four hundred five".