1243164 has 36 divisors (see below), whose sum is σ = 3146136. Its totient is φ = 381888.

The previous prime is 1243157. The next prime is 1243169. The reversal of 1243164 is 4613421.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1243164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1722 + ... + 2334.

2^1243164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573068).

1243164 is an abundant number, since it is smaller than the sum of its proper divisors (1902972).

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

1243164 is a wasteful number, since it uses less digits than its factorization.

1243164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 631 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1243164 is about 1114.9726454044. The cubic root of 1243164 is about 107.5250059009.

Adding to 1243164 its reverse (4613421), we get a palindrome (5856585).

The spelling of 1243164 in words is "one million, two hundred forty-three thousand, one hundred sixty-four".