1161810 has 64 divisors (see below), whose sum is σ = 3346560. Its totient is φ = 285120.

The previous prime is 1161791. The next prime is 1161829. The reversal of 1161810 is 181611.

It is an interprime number because it is at equal distance from previous prime (1161791) and next prime (1161829).

It is a super-2 number, since 2×1161810² = 2699604952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3345 + ... + 3675.

It is an arithmetic number, because the mean of its divisors is an integer number (52290).

2^1161810 is an apocalyptic number.

1161810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673280).

1161810 is an abundant number, since it is smaller than the sum of its proper divisors (2184750).

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

1161810 is a wasteful number, since it uses less digits than its factorization.

1161810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1161810 is about 1077.8729053093. The cubic root of 1161810 is about 105.1263784416.

It can be divided in two parts, 11618 and 10, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 1161810 in words is "one million, one hundred sixty-one thousand, eight hundred ten".