2191492 has 12 divisors (see below), whose sum is σ = 3861900. Its totient is φ = 1088096.

The previous prime is 2191489. The next prime is 2191493. The reversal of 2191492 is 2941912.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 968256 + 1223236 = 984^2 + 1106^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2191492.

It is not an unprimeable number, because it can be changed into a prime (2191493) 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 in 3 ways as a sum of consecutive naturals, for example, 1243 + ... + 2434.

It is an arithmetic number, because the mean of its divisors is an integer number (321825).

2^2191492 is an apocalyptic number.

It is an amenable number.

2191492 is a deficient number, since it is larger than the sum of its proper divisors (1670408).

2191492 is a wasteful number, since it uses less digits than its factorization.

2191492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830 (or 3828 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 2191492 is about 1480.3688729503. The cubic root of 2191492 is about 129.8912700321.

It can be divided in two parts, 219 and 1492, that added together give a triangular number (1711 = T₅₈).

The spelling of 2191492 in words is "two million, one hundred ninety-one thousand, four hundred ninety-two".