1151705405 has 4 divisors (see below), whose sum is σ = 1382046492. Its totient is φ = 921364320.

The previous prime is 1151705369. The next prime is 1151705447. The reversal of 1151705405 is 5045071511.

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 853866841 + 297838564 = 29221^2 + 17258^2 .

It is not a de Polignac number, because 1151705405 - 2¹⁰ = 1151704381 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, 115170536 + ... + 115170545.

It is an arithmetic number, because the mean of its divisors is an integer number (345511623).

Almost surely, 2^1151705405 is an apocalyptic number.

It is an amenable number.

1151705405 is a deficient number, since it is larger than the sum of its proper divisors (230341087).

1151705405 is an equidigital number, since it uses as much as digits as its factorization.

1151705405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230341086.

The product of its (nonzero) digits is 3500, while the sum is 29.

The square root of 1151705405 is about 33936.7854252579. The cubic root of 1151705405 is about 1048.2071915803.

Adding to 1151705405 its reverse (5045071511), we get a palindrome (6196776916).

The spelling of 1151705405 in words is "one billion, one hundred fifty-one million, seven hundred five thousand, four hundred five".