1243422165 has 8 divisors (see below), whose sum is σ = 1989475488. Its totient is φ = 663158480.

The previous prime is 1243422163. The next prime is 1243422179. The reversal of 1243422165 is 5612243421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243422165 - 2¹ = 1243422163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243422163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41447391 + ... + 41447420.

It is an arithmetic number, because the mean of its divisors is an integer number (248684436).

Almost surely, 2^1243422165 is an apocalyptic number.

1243422165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243422165 is a deficient number, since it is larger than the sum of its proper divisors (746053323).

1243422165 is an equidigital number, since it uses as much as digits as its factorization.

1243422165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82894819.

The product of its digits is 11520, while the sum is 30.

The square root of 1243422165 is about 35262.1917214458. The cubic root of 1243422165 is about 1075.3244854236.

Adding to 1243422165 its reverse (5612243421), we get a palindrome (6855665586).

The spelling of 1243422165 in words is "one billion, two hundred forty-three million, four hundred twenty-two thousand, one hundred sixty-five".