1131013405 has 16 divisors (see below), whose sum is σ = 1395316224. Its totient is φ = 879667200.

The previous prime is 1131013379. The next prime is 1131013409. The reversal of 1131013405 is 5043101311.

It is not a de Polignac number, because 1131013405 - 2¹⁹ = 1130489117 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 (1131013409) 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, 19549 + ... + 51421.

It is an arithmetic number, because the mean of its divisors is an integer number (87207264).

Almost surely, 2^1131013405 is an apocalyptic number.

It is an amenable number.

1131013405 is a deficient number, since it is larger than the sum of its proper divisors (264302819).

1131013405 is a wasteful number, since it uses less digits than its factorization.

1131013405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32076.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1131013405 is about 33630.5427401938. The cubic root of 1131013405 is about 1041.8917138366.

Adding to 1131013405 its reverse (5043101311), we get a palindrome (6174114716).

The spelling of 1131013405 in words is "one billion, one hundred thirty-one million, thirteen thousand, four hundred five".