2191456 has 12 divisors (see below), whose sum is σ = 4314492. Its totient is φ = 1095712.

The previous prime is 2191451. The next prime is 2191457. The reversal of 2191456 is 6541912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191451) 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, 34210 + ... + 34273.

It is an arithmetic number, because the mean of its divisors is an integer number (359541).

2^2191456 is an apocalyptic number.

It is an amenable number.

2191456 is a deficient number, since it is larger than the sum of its proper divisors (2123036).

2191456 is an equidigital number, since it uses as much as digits as its factorization.

2191456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68493 (or 68485 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 2191456 is about 1480.3567137687. The cubic root of 2191456 is about 129.8905587797.

The spelling of 2191456 in words is "two million, one hundred ninety-one thousand, four hundred fifty-six".