1165510420 has 24 divisors (see below), whose sum is σ = 2457106344. Its totient is φ = 464388096.

The previous prime is 1165510393. The next prime is 1165510427. The reversal of 1165510420 is 240155611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 728784016 + 436726404 = 26996^2 + 20898^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165510427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108237 + ... + 118516.

It is an arithmetic number, because the mean of its divisors is an integer number (102379431).

Almost surely, 2^1165510420 is an apocalyptic number.

1165510420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165510420 is an abundant number, since it is smaller than the sum of its proper divisors (1291595924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165510420 is a wasteful number, since it uses less digits than its factorization.

1165510420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227019 (or 227017 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1165510420 is about 34139.5726393873. The cubic root of 1165510420 is about 1052.3787099075.

The spelling of 1165510420 in words is "one billion, one hundred sixty-five million, five hundred ten thousand, four hundred twenty".