1091612 has 6 divisors (see below), whose sum is σ = 1910328. Its totient is φ = 545804.

The previous prime is 1091609. The next prime is 1091617. The reversal of 1091612 is 2161901.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136448 + ... + 136455.

It is an arithmetic number, because the mean of its divisors is an integer number (318388).

2^1091612 is an apocalyptic number.

It is an amenable number.

1091612 is a deficient number, since it is larger than the sum of its proper divisors (818716).

1091612 is a wasteful number, since it uses less digits than its factorization.

1091612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272907 (or 272905 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1091612 is about 1044.8023736573. The cubic root of 1091612 is about 102.9649549295.

The spelling of 1091612 in words is "one million, ninety-one thousand, six hundred twelve".