1091412 has 72 divisors (see below), whose sum is σ = 3249792. Its totient is φ = 302400.

The previous prime is 1091411. The next prime is 1091413. The reversal of 1091412 is 2141901.

It is an interprime number because it is at equal distance from previous prime (1091411) and next prime (1091413).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15337 + ... + 15407.

It is an arithmetic number, because the mean of its divisors is an integer number (45136).

2^1091412 is an apocalyptic number.

1091412 is a gapful number since it is divisible by the number (12) 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 1091412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624896).

1091412 is an abundant number, since it is smaller than the sum of its proper divisors (2158380).

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

1091412 is a wasteful number, since it uses less digits than its factorization.

1091412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1091412 is about 1044.7066573924. The cubic root of 1091412 is about 102.9586662944.

It can be divided in two parts, 109 and 1412, that added together give a square (1521 = 39²).

The spelling of 1091412 in words is "one million, ninety-one thousand, four hundred twelve".