1091964 has 12 divisors (see below), whose sum is σ = 2547944. Its totient is φ = 363984.

The previous prime is 1091957. The next prime is 1091983. The reversal of 1091964 is 4691901.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45487 + ... + 45510.

2^1091964 is an apocalyptic number.

It is an amenable number.

1091964 is an abundant number, since it is smaller than the sum of its proper divisors (1455980).

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

1091964 is a wasteful number, since it uses less digits than its factorization.

1091964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91004 (or 91002 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1091964 is about 1044.9708129895. The cubic root of 1091964 is about 102.9760210621.

The spelling of 1091964 in words is "one million, ninety-one thousand, nine hundred sixty-four".