1165431053 has 4 divisors (see below), whose sum is σ = 1176323040. Its totient is φ = 1154539068.

The previous prime is 1165431049. The next prime is 1165431061. The reversal of 1165431053 is 3501345611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1165431053 - 2² = 1165431049 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 (1165431013) 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, 5445833 + ... + 5446046.

It is an arithmetic number, because the mean of its divisors is an integer number (294080760).

Almost surely, 2^1165431053 is an apocalyptic number.

It is an amenable number.

1165431053 is a deficient number, since it is larger than the sum of its proper divisors (10891987).

1165431053 is a wasteful number, since it uses less digits than its factorization.

1165431053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10891986.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1165431053 is about 34138.4102295347. The cubic root of 1165431053 is about 1052.3548216506.

Adding to 1165431053 its reverse (3501345611), we get a palindrome (4666776664).

The spelling of 1165431053 in words is "one billion, one hundred sixty-five million, four hundred thirty-one thousand, fifty-three".