1081164 has 48 divisors (see below), whose sum is σ = 2944256. Its totient is φ = 302400.

The previous prime is 1081163. The next prime is 1081219. The reversal of 1081164 is 4611801.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

1081164 is an undulating number in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1081164.

It is not an unprimeable number, because it can be changed into a prime (1081163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5019 + ... + 5229.

2^1081164 is an apocalyptic number.

1081164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472128).

1081164 is an abundant number, since it is smaller than the sum of its proper divisors (1863092).

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

1081164 is a wasteful number, since it uses less digits than its factorization.

1081164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1081164 is about 1039.7903634868. The cubic root of 1081164 is about 102.6354030479.

Adding to 1081164 its sum of digits (21), we get a triangular number (1081185 = T₁₄₇₀).

Adding to 1081164 its reverse (4611801), we get a palindrome (5692965).

The spelling of 1081164 in words is "one million, eighty-one thousand, one hundred sixty-four".