1147806 has 72 divisors (see below), whose sum is σ = 2987712. Its totient is φ = 316800.

The previous prime is 1147793. The next prime is 1147819. The reversal of 1147806 is 6087411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1147793) and next prime (1147819).

It is a super-2 number, since 2×1147806² = 2634917227272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1147806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37011 + ... + 37041.

It is an arithmetic number, because the mean of its divisors is an integer number (41496).

2^1147806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1147806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1493856).

1147806 is an abundant number, since it is smaller than the sum of its proper divisors (1839906).

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

1147806 is a wasteful number, since it uses less digits than its factorization.

1147806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1147806 is about 1071.3570833294. The cubic root of 1147806 is about 104.7022859193.

It can be divided in two parts, 1147 and 806, that added together give a triangular number (1953 = T₆₂).

The spelling of 1147806 in words is "one million, one hundred forty-seven thousand, eight hundred six".