1165423270 has 32 divisors (see below), whose sum is σ = 2423087136. Its totient is φ = 398860800.

The previous prime is 1165423229. The next prime is 1165423277. The reversal of 1165423270 is 723245611.

It is a super-2 number, since 2×1165423270² = 2716422796514985800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165423277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309741 + ... + 313480.

It is an arithmetic number, because the mean of its divisors is an integer number (75721473).

Almost surely, 2^1165423270 is an apocalyptic number.

1165423270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1165423270 is an abundant number, since it is smaller than the sum of its proper divisors (1257663866).

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

1165423270 is a wasteful number, since it uses less digits than its factorization.

1165423270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623256.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1165423270 is about 34138.2962375102. The cubic root of 1165423270 is about 1052.3524790279.

Adding to 1165423270 its reverse (723245611), we get a palindrome (1888668881).

The spelling of 1165423270 in words is "one billion, one hundred sixty-five million, four hundred twenty-three thousand, two hundred seventy".